Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c70b0e5e5cd4fb…

MALICIOUS

PDF

47.2 KB Created: 2020-08-23 06:46:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0647f9910760ba0ed20998a8da2feaaf SHA-1: 6b405630e890fd4633e15c558ad77e7193522462 SHA-256: 86c70b0e5e5cd4fbc210b0da93b3a8ae2033063a4a82928bb7af6a369e45305e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) that is flagged as malicious. The document body text and heuristics indicate a lure for free downloads, likely a phishing or scam attempt. The presence of a malicious redirector URL and the high ML classifier score strongly suggest malicious intent.

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=money+counting+worksheets+2nd+grade In PDF document text
    • http://files.gameplayer.dk/uploads/1/3/1/1/131163832/nemib_wikelazavavamet_puxejov_zelupubenutij.pdfIn PDF document text
    • http://files.storyofayumerta.com/uploads/1/3/1/4/131482962/dd82b1b3460902.pdfIn PDF document text
    • http://pabut.ftmaagojuryu.com/uploads/1/3/0/7/130775248/bdee39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7167/6314/files/hp_pavilion_all_in_one_pc_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0887/4906/files/616514391.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4845/1739/files/factoring_quadratics_worksheet_math_aids.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/29842074819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/2139480392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4512/5281/files/kibodevufoguzubefopat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/idontwannabeyouanymore_piano_sheet_letters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8158/7093/files/98895335807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/36559402001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8645/3663/files/mixed_addition_and_subtraction_word_problems_3rd_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1079/files/16642753276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5746/1913/files/balance_sheet_items_definition.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000674d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674D 5448 bytes
SHA-256: c95a405989b1902c41a7da47f44fbc5855d35cf2ec05fb23c78e3da67517f86b
font_01_sfnt_off000079e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E9 11944 bytes
SHA-256: 81edf6c2b294f3864a60390acf98030d67f4d5e5c488ecda9cf509feaa644ea7
font_02_sfnt_off0000a116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA116 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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