Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ae021566f0c4f6…

MALICIOUS

PDF

46.2 KB Created: 2020-07-31 17:37:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 58a3c78e5421f1dbd93ea65d6bd8ee30 SHA-1: c937d11f6cb671add4e59f671349ee66b768201f SHA-256: 81ae021566f0c4f6325efa74ee65ecb38c3868c35dc0918faadd025669b5b6b0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to a redirector service, suggesting a phishing or scam attempt. The primary redirector URL is 'https://ttraff.cc/pify?keyword=tumblr+mobile+header+size', which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack.

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=tumblr+mobile+header+size In PDF document text
    • http://files.fdbda.com/uploads/1/3/0/7/130776407/vilozetepoveru-mumowufupewi-gekinalevu.pdfIn PDF document text
    • http://files.preecelightning.com/uploads/1/3/1/3/131397987/jimega.pdfIn PDF document text
    • http://files.fashionbysitaramysore.com/uploads/1/3/1/8/131856071/81c7b65.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/1/0433/8538/9206/files/lekipakorunogux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4158/files/92971438549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/25403461750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/belukesir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/45397227314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/95092265260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/fagusejogixalat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5770/8193/files/tozaduduz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2262/8502/files/vagelep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/bavijefaretefiriperep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/16158678535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7849/1041/files/senisututezopolizamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3046/3135/files/23664360202.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B69 4900 bytes
SHA-256: 5c4201edb39b820bb373755af4dc7c76463c7bb83ac663b774204cc07741195f
font_01_sfnt_off00007bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF8 9952 bytes
SHA-256: 8bb19d1552f9b15448be5b7fa56a76e41abf22a4b9fc1a71f2cb23098ef5033f
font_02_sfnt_off00009e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E01 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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