Malicious PDF — malware analysis report

Static analysis result for SHA-256 b77d1a9b072035e0…

MALICIOUS

PDF

78.6 KB Created: 2020-07-31 06:42:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf16e38051a292474a833246145d3533 SHA-1: 95b24299d5f37d0d24715faaccea71ac235273eb SHA-256: b77d1a9b072035e06dc3c3b0875eafa27ce70720116b8e7a553a1ea63f904077
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure at 'https://ttraff.ru/pify?keyword=agamemnon+seneca+pdf'. The document body is heavily obfuscated, but the presence of SEO-related link farming heuristics and the ML classifier's high confidence score suggest a malicious intent to redirect users. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links within the PDF.

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=agamemnon+seneca+pdf In PDF document text
    • http://files.azdirectmobility.com/uploads/1/3/1/4/131437873/2848040.pdfIn PDF document text
    • http://files.rebeccahodel.com/uploads/1/3/1/4/131410685/genolijudiwekota.pdfIn PDF document text
    • http://files.findanazhome.com/uploads/1/3/0/7/130776200/jofivomidujut.pdfIn PDF document text
    • http://files.teamkili2020.com/uploads/1/3/1/0/131071157/6030147.pdfIn PDF document text
    • http://files.networkerstec.com/uploads/1/3/1/3/131380158/zokirelidevu-vajebetuka-kotit-rizobuziwoneda.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/1/0431/4864/0418/files/xigijoketujanuregiwabosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/48425730984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/71845699058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6365/7119/files/zodemumiferozubuzevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0490/3069/files/migexozamoxasilunel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/8338545527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3422/9398/files/16304906454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/nuporiterun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0731/9974/files/81817287410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dubisetebezurazoxodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/49404249701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/27527363896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/zomekuraveretis.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF0 4996 bytes
SHA-256: 34b598eae3e21161a2004b9f61ab20b6ba87857ce3e8bd0aee911eb6c1921dd3
font_01_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 17476 bytes
SHA-256: 8fd930f49e92f6e25e4704e7f6e31f21e6d16ecedef922764bad0fcd12c9f785