Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff2022877db5f04…

MALICIOUS

PDF

63.1 KB Created: 2020-08-13 13:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d7d36bdf6140d75d5026782a65685ca4 SHA-1: 2c7357096210f9794e2f2f16d43a398ae5955e12 SHA-256: 8ff2022877db5f0432057b5cc94ffcf6f1de9af88e49001aa0c11901d1c6a986
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 a link farm hosted on Shopify. The primary redirector URL, https://ttraff.cc/wb?keyword=historia%20de%20san%20petersburgo%20pdf, is flagged as malicious. This suggests a phishing or SEO poisoning attack aimed at driving traffic to malicious infrastructure. No scripts were extracted from this sample.

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.cc/wb?keyword=historia%20de%20san%20petersburgo%20pdf In PDF document text
    • http://files.autumnselover.com/uploads/1/3/1/0/131070313/kanemuki.pdfIn PDF document text
    • http://files.bridgeyoungadults.com/uploads/1/3/1/6/131636625/2027955.pdfIn PDF document text
    • http://files.wildharvestuk.net/uploads/1/3/1/3/131381031/lirojexesasone-fupagutubipe-lewoxupiwuzo.pdfIn PDF document text
    • http://files.jjsdka.org/uploads/1/3/0/9/130969819/98a098cf.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/1/0428/9835/8432/files/75904593322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/finunakuwifuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/4663703139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/shell_programming.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/52371459106.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/kudupateperuxinade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/29994800517.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/yii2_documentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5636/4711/files/how_to_add_value_to_yourself.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/jogoxigabenefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/estndares_de_calidad_ambiental.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_off0000b752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB752 5280 bytes
SHA-256: 5f8de2f109fea6301ee2fb73fd35c4e8ac699cc79fd4bf32cff0646200655b39
font_01_sfnt_off0000c945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC945 11972 bytes
SHA-256: 0a492c92ffff939dbf281f34e51591fc872a3aa4f71c14978e728a5d2f5c1f1f

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