Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70c9a35180f3460…

MALICIOUS

PDF

40.5 KB Created: 2020-08-12 09:37:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f823d881eba4c83c3b7a6ad4aa19e122 SHA-1: 6c0fac2499447e097e34e5ccbb4b34cde83cb128 SHA-256: f70c9a35180f34602550292800fd724591f2837894f280c7f23e04c591333296
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=dictionnaire+d+accords+jazz+guitare+pdf' which is flagged as malicious. This suggests the PDF is designed to lure users into clicking malicious links, likely for phishing or malware delivery.

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=dictionnaire+d+accords+jazz+guitare+pdf
    • http://files.waysidechristianmission.org/uploads/1/3/1/8/131856860/638869.pdf
    • http://files.georgia-sabatier.com/uploads/1/3/1/1/131164479/pujizivomifixav_tamumevavox.pdf
    • http://files.mybtop.com/uploads/1/3/1/4/131452836/6890152.pdf
    • http://files.petervschaeffer.com/uploads/1/3/1/4/131406592/790336.pdf
    • http://files.zoeschildcare.co.uk/uploads/1/3/1/3/131384101/857068.pdf
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/converting_to_dwg_in_autocad_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7800/files/40494682255.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/jalawasemolifi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/zuxedono.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2074/files/list_of_companies_in_pakistan_with_email_addresses.pdf
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/20835234022.pdf
    • https://cdn.shopify.com/s/files/1/0432/1021/1491/files/arcane_warrior_dragon_age_origins.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tifomev.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/fizitijobiji.pdf
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/29519132692.pdf
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/49032925515.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4319/files/1640880747.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/gamescom_logo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f7a.bin
55e935c11836991faf109dd5f0c25f8008174472e05ad8ec0fd8c108a078e5a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7A 5416 bytes
font_01_sfnt_off00007207.bin
86ec68830fe56263a8e29451e8be07f4fa398afdc8182594e36ddf44ad5a7edf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7207 10152 bytes

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