Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef1578b3f773491…

MALICIOUS

PDF

43.0 KB Created: 2020-08-01 15:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce24423fa322e059b85e98a07c901150 SHA-1: a698d04afe723e3854a1a4b2bebcb416677712bc SHA-256: 1ef1578b3f77349114b08703c6be7680d88ec007ac2abec31f4f1d7bd664adea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating a phishing attempt disguised as a free download. The primary malicious URL identified is https://ttraff.ru/pify?keyword=st750lm022+hn-+m750mbb, which likely leads to further malicious content. The ML classifier strongly supports the malicious verdict.

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=st750lm022+hn-+m750mbb In PDF document text
    • http://files.rosewriting.com/uploads/1/3/1/4/131406558/1892392.pdfIn PDF document text
    • http://files.ruralnevadanews.com/uploads/1/3/2/7/132710780/d787f98c.pdfIn PDF document text
    • http://files.chainofeventsbw.com/uploads/1/3/1/8/131857115/wotokafepoxukusap.pdfIn PDF document text
    • http://files.theyogaden.net/uploads/1/3/0/7/130775400/gogan_nivofipav_jenuraxik.pdfIn PDF document text
    • http://files.mygosolartoday.com/uploads/1/3/0/7/130739316/ganosixagufunem-fafot.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/1/0431/2095/1458/files/gavolisepekigon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6187/8687/files/gatediraxofusolenopuxev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/poporawivatuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/favuzigenabagopoxuxavuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0200/3619/files/gumikopefugawegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4117/5190/files/1837634746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3575/3639/files/91492490971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1393/0142/files/46501015598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7115/2023/files/kutojobox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1324/8923/files/340065268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98012128422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8785/4749/files/97863427058.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 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_off000066e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E4 5192 bytes
SHA-256: 9a4795e5a19da6b2ef1afbc107899cfe6deb131039dc8ed4e70e74784545f096
font_01_sfnt_off00007883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7883 11568 bytes
SHA-256: 6e41333cb512d0d81e7ba3a850356782f0ffea6ea7a0fa2d848df25c43c9be31

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