Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa288fa26ee9161d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 21:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c702cfc4d9f67f078fc6c8c4f5a1e31 SHA-1: 0a966525552f32433f66870f0ca4a0e1dbc77ae4 SHA-256: fa288fa26ee9161d2bc9b8421c195d770393dc7e42d7883c77407525750cd055
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=android+studio+java+version', is directly linked to this redirector. The document body, though heavily obfuscated, contains text related to 'Android studio java version', suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links further supports the classification as a link farm, designed to distribute malicious content.

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=android+studio+java+version In PDF document text
    • http://files.floorstogoblog.com/uploads/1/3/0/8/130874238/vowaf-vugow-livofo-vumido.pdfIn PDF document text
    • http://files.nutrition-girl.com/uploads/1/3/2/6/132695755/faborajo-vokosusobif-wofapexal.pdfIn PDF document text
    • http://files.youtharcheryacademy.net/uploads/1/3/0/8/130874631/8190777.pdfIn PDF document text
    • http://kotefes.jhuntermotivatingminds.com/uploads/1/3/1/3/131383363/vebonuda_kubudexefajibok.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/1/0441/2496/2968/files/64179598935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/9333/9803/files/dunaxagovexakox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3856/0671/files/xupedejowirofopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/36944450918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3972/7509/files/mean_squared_error.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/8229/5969/files/best_vocabulary_for_ielts_speaking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/78633387351.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/31123017097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2697/0786/files/84514251782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/leriduwimazuvenuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9978/1275/files/clase_actinopterygii.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4800/0927/files/vexipupoli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4784/4000/files/7886654141.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 4

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_off000066b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B9 4912 bytes
SHA-256: 73ee331173f03e11e7c40ace263469b3884dc26ef403ab1c35bb5ccf085ab71a
font_01_sfnt_off0000777d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777D 9980 bytes
SHA-256: 1baf15d3ecf30496382c83b3da613ec4eaedfdf04c209a06daecf32662132af3

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