Malicious PDF — malware analysis report

Static analysis result for SHA-256 7629b7026672be5a…

MALICIOUS

PDF

46.5 KB Created: 2020-08-07 19:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57f87a4db68139dbab15e8f350410806 SHA-1: 942b9ef88d0b482956d3a7e1ac484a0f6e3ce1c4 SHA-256: 7629b7026672be5a95533e3a16f01229ed8336601919d5ec745847f753e468eb
162 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one to a known malicious redirector, suggesting a phishing or scam attempt. The presence of a 'download button' lure and the ML classifier's high confidence indicate malicious intent. The document body itself contains obfuscated text and URLs, likely part of a SEO link farm designed to attract users searching for document conversion tools, ultimately leading them to malicious infrastructure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pdf+to+editable+word+converter+offline
    • http://files.electivese.nl/uploads/1/3/1/3/131380845/d2672d439.pdf
    • http://files.threeaineconsultancy.com/uploads/1/3/1/0/131070125/587526f65.pdf
    • http://files.architetturamcmm.com/uploads/1/3/0/8/130874102/raxadenazegu-fenedup.pdf
    • http://basenefib.mskstech.com/uploads/1/3/0/7/130739415/dafuwemosa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/64872725905.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/vawipiregedufa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/18747227360.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/wofininikobezaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/convert_cdr_to_zamzar.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/fumidofatoworubefuriridoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76222514852.pdf
    • https://cdn.shopify.com/s/files/1/0432/8374/2884/files/ponefa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/d_d_3._5_frostburn.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/gufoneb.pdf
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/wasowisukeko.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/alopecia_androgenetica_masculina.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_off0000780e.bin
626812419f5eccd85198f28e6cdccb1df832a73bafd5544e5a5e49858d6aaef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 5128 bytes
font_01_sfnt_off000089ae.bin
8e7e4bbe824cfc08f4e8bd1c14b6e0d381e58120bfcbd87b26ff23a35363bee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89AE 10260 bytes

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