Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8b5336cf35b8e2…

MALICIOUS

PDF

35.8 KB Created: 2020-08-06 03:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bb8107b4ec1bd3db309d149bf8b64c13 SHA-1: 23ad0f59bf40f2a2ac5ead99076a8c4376cf745f SHA-256: 8a8b5336cf35b8e2376dcb5dcf4bedbcffb5c22cfe9f0543693c23f4b83246aa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=adverbs+of+frequency+exercises+for+beginners+pdf'. The document body, though heavily obfuscated, contains text related to 'Adverbs of frequency exercises for beginners pdf', suggesting a lure to disguise the malicious links. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm designed to attract traffic to malicious destinations.

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=adverbs+of+frequency+exercises+for+beginners+pdf In PDF document text
    • http://files.batrssocal.com/uploads/1/3/1/3/131384789/vipibifoxoteroxu.pdfIn PDF document text
    • http://tubizu.legendarystrengthgym.com/uploads/1/3/1/3/131381078/lokugidu_resalafeloxoli_tetusuvunav.pdfIn PDF document text
    • http://files.arealisticplan.com/uploads/1/3/0/7/130775977/jebizewel_rifasor_kivifo_moboguzux.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/1/0436/3694/9152/files/ip_man_english_dub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/nizazep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5167/0943/files/sozukovobogosidewe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/77464063877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/cantaloupe_island_tabs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/giwebegukifev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9850/4354/files/rofam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1462/7223/files/fuwetiginatuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/92598565513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/migixiwozas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gokibaleginasesomedusuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/22078551112.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_off00004d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D58 5568 bytes
SHA-256: 94bdacbeb878d97ef2ca804fb603b7054492bf8918f6263192bba0586865b5a8
font_01_sfnt_off0000605c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605C 9884 bytes
SHA-256: 53701f445153bd0f93f712efb1fad8baf0fe6f450178c2ab85c23afeec4aea4c

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