Malicious PDF — malware analysis report

Static analysis result for SHA-256 df44fbd74f260039…

MALICIOUS

PDF

68.6 KB Created: 2020-08-02 02:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff31684a374d38b0d1ba04f72f5ac6d4 SHA-1: f5e5644088911a5dca29b21c53278eef1effea75 SHA-256: df44fbd74f260039c8986cf65afc7e1dde7f665ff11a702ff6625ecb0448ec78
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a direct link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body content, though partially corrupted, includes the search term 'Singer sewing machine serial number g', suggesting a lure to attract clicks. The presence of multiple PDF links and a redirector indicates a likely phishing or scam campaign.

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=singer+sewing+machine+serial+number+g In PDF document text
    • http://files.lolaca.com/uploads/1/3/0/7/130738765/3048349.pdfIn PDF document text
    • http://files.stpaulpensacola.org/uploads/1/3/2/3/132303339/vebofaxosutijak.pdfIn PDF document text
    • http://files.illinois-fpsb.com/uploads/1/3/0/7/130738666/sadalofurotumus-xamax-tepamewelirof.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/1/0429/0835/2679/files/guzotozitimerawanovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/rudopevida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0336/9878/files/gijafavopud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8747/0485/files/965551091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/94390478919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/nokavafovuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/lupifafadujulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/wubesasalimafusobofudege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/puziritotesokebate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/kufakifobabine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/11146164346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/67529218800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8874/7423/files/tenulalipejitaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/9647936974.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 4

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_off0000c597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC597 5548 bytes
SHA-256: a09fdf51a6cf2ce33c13fada3e427e6d8142bf583c1cff821bab629f3098de87
font_01_sfnt_off0000d85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85A 14180 bytes
SHA-256: c79afce61b328d4943ddad13964150fa37759be7cf15276bf330fe6082dde99a

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