Malicious PDF — malware analysis report

Static analysis result for SHA-256 4510851c531b6334…

MALICIOUS

PDF

47.3 KB Created: 2020-08-21 10:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e198f7f1ad516bb33b47919302aa9775 SHA-1: 3d1a59cfee0fe7c648386745ebf3340c14de643a SHA-256: 4510851c531b63344709a2014ea8ffe6a7f9e7897a907d70e31de52e69f7efa3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a critical heuristic for linking to a known malicious redirector. Additionally, it contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=extent+report+in+selenium+github, which is likely used to distribute further malicious content or conduct phishing. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=extent+report+in+selenium+github
    • http://kizarif.francismakemiepc.org/uploads/1/3/1/8/131872055/2431119.pdf
    • http://files.heathercarreiro.com/uploads/1/3/1/4/131483201/pubesezox-bupulidonope-fikarufi-pezoriwibifumod.pdf
    • http://files.giftedwiththejourney.com/uploads/1/3/2/6/132695491/bojune_zevirigotejipe.pdf
    • http://wimomibab.loganacctg.com/uploads/1/3/2/6/132695278/9365850.pdf
    • http://gebafuki.fusioneventsworldwide.com/uploads/1/3/2/6/132695471/f5309.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9631/files/nugizubidax.pdf
    • https://cdn.shopify.com/s/files/1/0435/1059/5748/files/apa_manual_6th_edition_ebook_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/adjectives_of_personality_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/0100/1630/files/apple_iphone_7_plus_camera_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/7095/5415/files/sejarah_amandemen_uud_1945.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/new_bible_commentary.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/18274432911.pdf
    • https://cdn.shopify.com/s/files/1/0435/7442/7806/files/81721130216.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a48.bin
2ee9d69d0185348fd14e8041289487a726377413f44235ec40b9fd073d769f1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A48 5072 bytes
font_01_sfnt_off00007b5c.bin
067468e80423ce3181b08e8dc36a9c8dc3742f9c1cbf1549515f86681102b928
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5C 11468 bytes
font_02_sfnt_off0000a266.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xA266 4324 bytes