Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be4ba8c3433d810…

MALICIOUS

PDF

42.1 KB Created: 2020-08-01 20:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5676e319dcf557b16f7661495532e823 SHA-1: 1fa6bae56ac5c4f07a84354b116839987bc02d8c SHA-256: 4be4ba8c3433d810f515e5c9c8b9e500dc3c7609071e5ec9ecfc9e4f7624d513
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a redirector URL, disguised as a technical manual. The primary heuristic indicates the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the target URL and references to a 'diesel engine repair manual pdf', supporting the lure. The file's purpose is to redirect the user to malicious content.

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/pify?keyword=diesel+engine+repair+manual+pdf In PDF document text
    • http://files.literaturehouse910.com/uploads/1/3/2/7/132740930/lufomonu.pdfIn PDF document text
    • http://files.alpatsminiatureschnauzers.com/uploads/1/3/1/4/131407138/patir.pdfIn PDF document text
    • http://files.voidarts.net/uploads/1/3/0/7/130739059/judinuxagis_vuboxu.pdfIn PDF document text
    • http://files.rightmovecolorado.com/uploads/1/3/0/7/130740521/vuguz.pdfIn PDF document text
    • http://files.hunterlegacyyearbook.org/uploads/1/3/0/7/130740211/9212805.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/rubezegegax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8207/2743/files/xaruxigejawade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2485/files/pizagukonirure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1910/6461/files/that_was_easy_button_sound.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/sukodod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/lopinowejivowodub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/volorozasis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6690/8054/files/14415341447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1092/3423/files/bexuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4321/6789/files/56373163194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/82164241750.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://scripts.sil.org/OFLIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6597 5360 bytes
SHA-256: 14036140ee5e1a3702cff0a2d7eacb23c666dfc40b099da4c10ef026b9770b2d
font_01_sfnt_off000077c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C0 10532 bytes
SHA-256: 9e8e567b5e211632aa63c482bdcfa75c90b19ffb0af7a29ef88bf4ea177bc12d

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