Malicious PDF — malware analysis report

Static analysis result for SHA-256 855cf05380856af7…

MALICIOUS

PDF

48.2 KB Created: 2020-08-07 10:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b085234d571d90212dd8643da01f9d40 SHA-1: 20d041b38e44bbbad99be7ab92ef97dd36eaf743 SHA-256: 855cf05380856af74ede3b7f6210a3449948f55ba6185b919707c6e382817ced
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm designed to lure users into downloading PDFs, ultimately leading to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=reunion+de+alma+ata+1978+pdf In PDF document text
    • http://files.trailsuntraveled.com/uploads/1/3/1/4/131408100/2bab06ec6c3960.pdfIn PDF document text
    • http://files.lucidletters.com/uploads/1/3/0/8/130874612/3252687.pdfIn PDF document text
    • http://nuxev.scarletvalleylogistics.com/uploads/1/3/1/3/131379803/b2fb56ce18.pdfIn PDF document text
    • http://files.seeandbekitchen.com/uploads/1/3/1/4/131407965/ruduletoxivi_binedoxoze_lebapur_genamamobakotuf.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/1/0432/3049/4878/files/senamewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/ruwanupivaridamimunupese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8426/5110/files/sajorexepatobixakadomege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/39701306822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/zolononiwemuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7280/5277/files/13577432997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegegezanonipilupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/mawefakabawotetep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/difitoxux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1225/7952/files/pazuwugopulokomidiraf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/wumonaxokukoputataxubepol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/66654830909.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5473/4235/files/kutegewabukuzivax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/luzejajegaxidalide.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 1

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_off00007ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF8 5404 bytes
SHA-256: 3facfa32471b237d5bedadf611e0e6e808e9a315e9ade5e9887a85364e57da06
font_01_sfnt_off0000915d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x915D 10112 bytes
SHA-256: cdabd835e890e9bfc04aed5bf56be4ec9eed5e0b23d82b9e319348b856aba0ae

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