Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaac1c498cce3d1…

MALICIOUS

PDF

50.4 KB Created: 2020-08-23 05:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 38bc5993ad89b03a9bb47a8f5aa16ea1 SHA-1: 9a149dfa558648c8285663034245d8cf965b1147 SHA-256: 7aaac1c498cce3d1cb0a7db6249d40dc4d474079124c67e6b85532077627e56c
254 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirectors and a link farm, designed to obscure the ultimate destination. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document explicitly requests sensitive recovery information, a common phishing tactic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.com/pify?keyword=firebase+sdk+android In PDF document text
    • http://zetilom.labour4bromley.org/uploads/1/3/1/6/131606552/954727be5316.pdfIn PDF document text
    • http://files.cwa3112.org/uploads/1/3/2/6/132695465/9044716.pdfIn PDF document text
    • http://files.graycoolingman.com/uploads/1/3/0/8/130874627/9e8f1f36e15075.pdfIn PDF document text
    • http://files.toralconsulting.com/uploads/1/3/0/7/130775732/6a26d23286b0c6.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/1/0437/0094/5048/files/lefobiwovukitit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/nudupoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/miwifoluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/73137308457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/gudaxifadememijineke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8831/3506/files/14555617396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/8454161499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8817/5513/files/rukobaronafimuxuwes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8407/0558/files/aromatic_substitution_reaction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9724/2280/files/54055856404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/adobe_livecycle_designer_download.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
🗂 Part of campaign: graycoolingman.com 3 samples

Related samples 3

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_off00008796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8796 4948 bytes
SHA-256: f8f468b479e9080b64100dc5ed3051738fcabb510556cfaeb49e5d7d40a9b29d
font_01_sfnt_off0000986c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986C 10668 bytes
SHA-256: 55b1bce788ccd985c9bfaa00cf72c69ce4d5d6fc487640106ac13797dc247105

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