Malicious PDF — malware analysis report

Static analysis result for SHA-256 036035167d154489…

MALICIOUS

PDF

38.5 KB Created: 2020-08-11 15:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12d1af5637d8aba49218f79e5efe2faf SHA-1: b7b1e6e65a4ec3dd1eb83105c68fcd4e302c3fd1 SHA-256: 036035167d154489a625c5b1a8cb760dd252ea8baff88b55afa945e73e2910f3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=abakada+tagalog+pdf', which is flagged as a known malicious infrastructure. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The ML classifier strongly indicates maliciousness, and the overall structure suggests an attempt to lure users to a malicious site.

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=abakada+tagalog+pdf
    • http://mijeg.cornercounseling.com/uploads/1/3/1/4/131453247/1d5fff9.pdf
    • http://files.fccchristopher.com/uploads/1/3/0/7/130775055/e74052aadc8ee.pdf
    • http://files.sandraturay.com/uploads/1/3/1/6/131636954/rutod-zelufir-wovatiso.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4028/4583/files/14234693291.pdf
    • https://cdn.shopify.com/s/files/1/0432/6460/6372/files/john_deere_s82_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/dufizere.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/62497386800.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/osha_10_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6798/1476/files/5346282512.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/dr_0104ad_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/bachelor_of_science_in_information_technology_curriculum.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/whirlpool_ultimate_care_ii_washer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/wabewenimirumel.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/demisanakolaxowefutanas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b92.bin
29b28096332753ec8c120d89482e9aeca255fbcfb907ededa6d436abd647b677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B92 4644 bytes
font_01_sfnt_off00005b66.bin
887d1e8dccad7eb10f703dff8be5aea62e89b4d1441dd380ebcb611b3f5d7895		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B66 10524 bytes
font_02_sfnt_off00007f67.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F67 4324 bytes

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