Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a08bc27fa87b7b…

MALICIOUS

PDF

44.5 KB Created: 2020-08-24 17:11:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2589942a2c8b3eee622ef353c50a813e SHA-1: 0394fa6b1bad156b2e3ebdded5a8a5a4c09b57f0 SHA-256: 70a08bc27fa87b7be8fa91c2d00fac562e22cea0b0a6708f856acb0880eee8e2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to obscure the final destination. The document body also contains a URL that appears to be part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. 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.com/pify?keyword=biohazard+2+game+for+android
    • http://bavat.keyfloorswholesale.com/uploads/1/3/1/4/131453177/xidijadutowi.pdf
    • http://files.teachpopulationhealth.org/uploads/1/3/1/8/131858661/kekigadopu-zuvimukolawop-zujok.pdf
    • http://zoger.abishealthbeauty.com/uploads/1/3/2/3/132303382/jajupevitewil-tazofad-pugofavuka.pdf
    • http://mikapejed.domissimahomes.com/uploads/1/3/1/3/131398560/zirotujenomowiveg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/arithmetic_progression_class_11_ncert_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/0041/4883/files/83944987164.pdf
    • https://cdn.shopify.com/s/files/1/0433/0435/3956/files/acido_glutamico_neurotransmisor.pdf
    • https://cdn.shopify.com/s/files/1/0430/5453/0709/files/xabuzikidamik.pdf
    • https://cdn.shopify.com/s/files/1/0435/1016/9759/files/heil_gas_furnace.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/ielts_general_training_writing_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/andante_andante_piano_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6861/files/information_about_interior_designing.pdf
    • https://cdn.shopify.com/s/files/1/0440/2331/6630/files/27433229570.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/68119374811.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/rujaf.pdf
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/eutech_ph_meter_calibration.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005966.bin
61f16e9f55112102265f041779d64f0538ef4281d2579928071961de51a45cbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5966 5340 bytes
font_01_sfnt_off00006b7b.bin
8acc41dd9cb4c4e80beb03678a829e232472a42175676c2cd27e60eae2018e86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7B 10272 bytes
font_02_sfnt_off00008edd.bin
213a6ab797dc35435dc408fc8c1cfa058450217142279b1e22f23a6708e491d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDD 16368 bytes

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