Malicious PDF — malware analysis report

Static analysis result for SHA-256 2361994e49139f27…

MALICIOUS

PDF

49.8 KB Created: 2020-08-12 23:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 331a77acdb1d950676704eeb2fa0b07b SHA-1: 2d36280a10f28b026249d3bd27d13e69c035d198 SHA-256: 2361994e49139f27bc8749b3584c85e3b6164e94fa3381bfa95f251f4f2ff713
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=abdominal+pain+approach+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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=abdominal+pain+approach+pdf In PDF document text
    • http://files.littletwinkleacademy.org/uploads/1/3/1/4/131453733/aa590908.pdfIn PDF document text
    • http://files.straitsobserver.com/uploads/1/3/1/4/131408899/3569057.pdfIn PDF document text
    • http://duzopejes.fiftyshadeslove.com/uploads/1/3/0/9/130969332/regibubizoxam.pdfIn PDF document text
    • http://files.lblumber.com/uploads/1/3/1/4/131409200/bawufipex.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/1/0433/0687/7080/files/texojorigerusoxuduk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1893/4677/files/ruwedovesinubofin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5903/3752/files/selusovagesitugexupig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8396/4324/files/dawexovuxidabarudikan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3801/4616/files/sovojidizisetokosepazumor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/minecraft_sea_lantern.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1266/1146/files/spanish_english_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7865/5903/files/19988680951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0318/2231/files/naxerijopasasumom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/menosejab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7400/8726/files/16184933889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4789/4683/files/19752617700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/88283285830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7228/3033/files/14528335675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7872/7318/files/cancer_cervicouterino_tratamiento.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B1 4936 bytes
SHA-256: 627a29111dddc35d9722ee4e6eddb91b9b740c20ac745b3f3a509a62455e94bb
font_01_sfnt_off0000892d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892D 10016 bytes
SHA-256: f6672f4e143bd10d7113c99b07762c10b6c7c39d89dd6b0c8ac0089a6967e381
font_02_sfnt_off0000ab61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB61 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c