Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4012eb32df6e2a…

MALICIOUS

PDF

41.2 KB Created: 2020-08-23 13:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 19ee4b3909ba547d35aa3a5f9d6dd83c SHA-1: 1acbaf2370f0bc60866da020714bac8604af5cdc SHA-256: ac4012eb32df6e2a1a189e6cdc1e1a3f4608ced920ea139412fe04632bffb42c
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, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be a link farm or redirector, likely intended to lead users to malicious content or for SEO manipulation. No scripts were extracted, limiting the analysis of direct payload delivery.

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=english+film+song In PDF document text
    • http://jiniro.virtus.hu/uploads/1/3/0/7/130738799/xijuxuzekipozeso.pdfIn PDF document text
    • http://files.canuckdivers.ca/uploads/1/3/1/4/131483154/9772648.pdfIn PDF document text
    • http://files.odpeople.com/uploads/1/3/1/3/131383791/7076576.pdfIn PDF document text
    • http://files.drrebeccaaptekersandtonpsychology.com/uploads/1/3/0/9/130969985/munev-mezazosin.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/1/0437/6553/0785/files/24576770176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/chirodini_tumi_je_amar_song_ringtone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/napetevisonuluxenifuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9105/8076/files/ruxad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/20961424446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8042/5370/files/61353261504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0951/0297/files/pengertian_atresia_bilier.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6423/7992/files/pefezaladuxetexupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/44348195779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/99453251884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3886/6584/files/54788469665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/1231449551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7430/6719/files/zitobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/redefujijiduwolegepo.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_off000064ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64ED 4832 bytes
SHA-256: 7fbec0c6215a9eae6deab5700668cd81ed6381b9d7fe1f7952301569d3b6fc83
font_01_sfnt_off00007543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7543 10192 bytes
SHA-256: 4d5afb324738552c2292c359d6c50d9a56e42e97d2521873c94195ca561fb948

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