Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28b3d2d53a873aa…

MALICIOUS

PDF

43.8 KB Created: 2020-08-25 05:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8a78fb9ec4c3158cd34f6c8c2dff4d4 SHA-1: caeb0573c410f15b6c4f7bd1a9ced3c3ad09378d SHA-256: f28b3d2d53a873aa65192b87d27d939e3e3fab73eaf0509b3d92135445f61271
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a video player for Android. The document body and embedded link structure indicate a lure to a malicious URL, specifically 'https://ttraff.cc/pify?keyword=speed+video+er+for+android'. The PDF also features a link farm with numerous external PDF links, many hosted on Shopify, suggesting an attempt to manipulate search engine results or distribute content through multiple channels. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=speed+video+er+for+android In PDF document text
    • http://ximines.learningexchanges.org/uploads/1/3/0/7/130775565/9604509.pdfIn PDF document text
    • http://kixap.lunalili.com/uploads/1/3/1/3/131398125/guxupuvomoliw.pdfIn PDF document text
    • http://vebalu.1sthkcsg.org/uploads/1/3/2/8/132814930/bupemumorevefada.pdfIn PDF document text
    • http://files.inspiringinns.com/uploads/1/3/1/3/131380788/nekonisoxipeket-zekag-tevoxog.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/1/0432/2118/8763/files/accounting_cycle_10_steps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/gogikopep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/gajokolago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2103/files/vafoguwetafuginokapovego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8036/5720/files/56758992059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/8679381775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mofofuledezenededur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/70372478086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9658/8967/files/77853539441.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_off00006cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBF 4988 bytes
SHA-256: e09f30a271e7772164a0c517ffb7537b2f37236f31c1b86e133195e6e4cccc8b
font_01_sfnt_off00007dd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD3 10600 bytes
SHA-256: cf69e687dda35379e0e96e3002337c15b9f1a3979e98a7547444719bdb04aebe

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