Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0a33ff6858c898f…

MALICIOUS

PDF

43.3 KB Created: 2020-08-11 14:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e6f18bf47aacc11a6f6df03831adf85d SHA-1: 7e408b7b762cb3a6e87bd7d7ed3bbe9005430aba SHA-256: a0a33ff6858c898fbb71929a6a26d9f3751bf8591a025ef63b810ab05da45899
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous URLs, including a suspicious one pointing to 'ttraff.ru', which is identified as a malicious redirector. The presence of a large number of embedded links suggests an attempt to lure users to external, potentially malicious, sites.

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=balisong+tricks+pdf In PDF document text
    • http://files.proficiencyfirst.com/uploads/1/3/1/4/131437633/3860664.pdfIn PDF document text
    • http://kinur.letterstolawyers.com/uploads/1/3/0/7/130775918/wanem_gokozedenadipo_jizudiluzo_kuwevewet.pdfIn PDF document text
    • http://nowegu.abrahamroisman.com/uploads/1/3/0/7/130775795/xerodobaxifonif_pomaf_fikaku_xoregofi.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/1/0430/5253/1869/files/georeferencing_arcgis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64541570927.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/jipinaremuwilapez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/60720074763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/lugojogabobunemelipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/xutofetavuxulifewijivuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4603/4853/files/zetanufusimugufixowima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3595/1257/files/49346873645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6508/7902/files/98510398842.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4171/0499/files/mazuwegufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4922/6135/files/barrisol_mirror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/54805184045.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
🗂 Part of campaign: letterstolawyers.com 4 samples

Related samples 8

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_off00006c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C04 5436 bytes
SHA-256: fc299eef92243188cdcf8bc905684e6ae2cdc7edb5e7980fb4c84d2e77d5cf43
font_01_sfnt_off00007e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8A 9888 bytes
SHA-256: 8a0b66d031358b29649d3c2d0b6a19f59d06803a3b2d24f7bb1d3cd5bf2a8f1f

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