Malicious PDF — malware analysis report

Static analysis result for SHA-256 660828b357ba34ed…

MALICIOUS

PDF

77.6 KB Created: 2020-08-09 21:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 07ea6ab9123449ae8553cc9aed40935d SHA-1: cb938e90142e1f3f1a684cea371d453317cb5a53 SHA-256: 660828b357ba34ed0e7dc62d893eebe6450806f81e1faa7d768f7a943ba52375
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into downloading malicious content or visiting a phishing site. 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.ru/pify?keyword=penfigoide+ampolloso+tratamiento+pdf In PDF document text
    • http://files.studioaase.ca/uploads/1/3/1/4/131407530/fumuge.pdfIn PDF document text
    • http://files.caloushop.com/uploads/1/3/1/0/131071137/pimagiw.pdfIn PDF document text
    • http://files.thefamilyfunband.com/uploads/1/3/0/7/130739452/tumamoxelas.pdfIn PDF document text
    • http://files.petridish-science.org/uploads/1/3/1/6/131607404/dazikukemekim.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/1/0437/0428/7383/files/39584637953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/nivuzadawidub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/roxuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/19846259816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/4890572543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/depopadufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35035436777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/food_club_neopets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5586/5242/files/4162044296.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/vesepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3242/0250/files/botitajuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8788/8551/files/89579828968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/lufewugafulegetenikesedu.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 7

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_off0000eebd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBD 5360 bytes
SHA-256: 1508be5cebaef4e74f433a73aeee0d9ab7765196dfa04a6fb41b41f81216c36a
font_01_sfnt_off000100e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E9 11816 bytes
SHA-256: e903bfdaef4a13df8188928eeeb922773e47b648e591ca186b091e60f2a21993

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