Malicious PDF — malware analysis report

Static analysis result for SHA-256 51183c648b2d1aa1…

MALICIOUS

PDF

42.6 KB Created: 2020-08-07 14:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0148b35c2b3904219f0a9f57d0b27fd7 SHA-1: ec987497120ccd56b97d95bc6d439dfe5822edc1 SHA-256: 51183c648b2d1aa188e844d89f99f1806cb24f41eecab63b4563cccac34b615b
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to ttraff.com, a known malicious domain. It also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the primary malicious URL, suggesting a social engineering lure to download further content or navigate to a malicious site.

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.com/pify?keyword=simple+english+translation+book+pdf In PDF document text
    • http://files.yergens.net/uploads/1/3/1/6/131637178/1890600.pdfIn PDF document text
    • http://files.mealsonwheelssb.org/uploads/1/3/0/9/130969498/a839d36.pdfIn PDF document text
    • http://zizatuv.hubbellbros.com/uploads/1/3/0/7/130738837/jikifexugulerur_jupiminabudu_papisok_jikit.pdfIn PDF document text
    • http://mixoki.yogadharmadowntown.com/uploads/1/3/0/8/130874276/jupujejopino.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/1/0437/7057/7058/files/91849814246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/watch_spartacus_on_line.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/xelidiluxigaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/pdf_to_word_download_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/sabawer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/bigibimogaweseviwuwip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7078/2624/files/shadowrun_4th.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3571/3958/files/11361455569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/representantes_del_materialismo_historico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2902/files/machine_learning_by_andrew_ng.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/89033407878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/mukesimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/principle_and_application_of_chromatography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/type_a_type_b_personality_test.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_off00006765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6765 5764 bytes
SHA-256: 08aecb7cfffc9f01bc18804f32778684bc635261a0adecde3d60daf39084b9f7
font_01_sfnt_off00007ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD2 10072 bytes
SHA-256: 64a466a5bab1c3c8ab1b8efbe71ac46362d612ad2ca08ecc1f2ea0839867809f