Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b12124caa6e606…

MALICIOUS

PDF

43.8 KB Created: 2020-08-31 15:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f34abe099867f2d8e233263937e864 SHA-1: f3f2afe9d7a90c8b7366a6f51f2a49eb14271600 SHA-256: 18b12124caa6e6066431edfe4b2ab8a75991b32c6d27bc10daa91b07860388c6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary link identified, 'https://ttraff.com/pify?keyword=unanswerable+questions+with+answers', is flagged as malicious. This suggests the document is designed to lead users to malicious infrastructure, likely as part of a phishing or scam campaign. No scripts were extracted, but the presence of numerous links points towards a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=unanswerable+questions+with+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9c0842_3ef4ab9ac44441f2a32d3da5a4d3853e.pdf
    • https://static.usrfiles.com/ugd/97368a_df1e4de3d5a74303ad6bb42f75044bb5.pdf
    • https://static.usrfiles.com/ugd/1e4819_7f38682d5ef84e9fbd282d19d35cf5fa.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/understanding_and_using_english_grammar_2nd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0916/9815/files/jakoxowetabewovizaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4838/files/reinventing_leadership_warren_bennis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/46064218090.pdf
    • https://cdn.shopify.com/s/files/1/0431/5676/6882/files/manipexarorawukaxupid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/gexavewetesaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3367/files/7824859195.pdf
    • https://cdn.shopify.com/s/files/1/0432/6188/6627/files/brothers_in_arms_full_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/tubamekemanuxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/0799/0169/files/70783659018.pdf
    • https://cdn.shopify.com/s/files/1/0433/3702/3641/files/usmc_drill_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/alto_adige_quotidiano_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e8a.bin
8cad73d91fbf1d16d0a4ed34675fe9ac1fa1cff1d5f2c5494754f93a71567b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8A 5124 bytes
font_01_sfnt_off00008008.bin
01aef99dae306963e9843fa2aaf06cd227b4b9839245e4dc9cef70b7fc4409b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8008 10076 bytes

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