Malicious PDF — malware analysis report

Static analysis result for SHA-256 940ce33b1edcf347…

MALICIOUS

PDF

125.9 KB Created: 2020-08-07 07:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4d9172062071e1b9ea98bbd4918d7a66 SHA-1: 0d27b6b7ec77db653e3bbd2fa9f6e47c05db7c8d SHA-256: 940ce33b1edcf347067abe2a0e3ce8d158a5b24fa1fafa86f8d7d6d8e51ed9b1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, with one heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=surat%20al%20waqiah%20latin%20dan%20terjemahan%20pdf'. Another heuristic indicates a PDF link farm, suggesting SEO poisoning or a large-scale phishing attempt. The document body, though heavily obfuscated, contains references to URLs and appears to be a lure for the content mentioned in the URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=surat%20al%20waqiah%20latin%20dan%20terjemahan%20pdf In PDF document text
    • http://files.campkenosee.net/uploads/1/3/1/3/131381288/543828.pdfIn PDF document text
    • http://files.stemteachersnwa.org/uploads/1/3/1/4/131453917/1577338.pdfIn PDF document text
    • http://files.springfieldmiddle.com/uploads/1/3/1/4/131438289/sopojodimu.pdfIn PDF document text
    • http://files.oogeu.com/uploads/1/3/1/1/131164250/9350808.pdfIn PDF document text
    • http://files.jj-figurines.com/uploads/1/3/1/3/131380292/vobagukegutav-fewezaval-pibasenajek-dewife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/86019085180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/lipid_oxidation_frankel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/kejavedurilijuzareni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/10_team_double_elimination_bracket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/28033558273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/supuvotakaduxeziwigaluva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/67560040524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0319/0181/files/rogozazojiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/pojiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1809/0653/files/zenujiwegisupenigozexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/dupazase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4225/7561/files/bet_on_it_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/nirirojaxaresumunojo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00019e42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19E42 34108 bytes
SHA-256: 4b29184bdd6edc4240859bee2da1cc6edd5fc58b7f2658ea53f7889b81f397b9
font_00_sfnt_off00016b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B1C 5272 bytes
SHA-256: 8ad2c957310890482fbaba3b3d5430d24fbda1e6fc31b45d48b34d7fe1d191d9
font_01_sfnt_off00017ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CE4 10604 bytes
SHA-256: bccd8a2f75dfd2e2d5f17d6156b6f069fbeca2e77cbee263202b3cf8902684f5
font_03_sfnt_off0001d95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D95A 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd