Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2b043444b0aacc…

MALICIOUS

PDF

42.5 KB Created: 2020-08-20 02:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12c278535b555b6347ef925e2e705de0 SHA-1: 08752b649f81934190b61b05b208e476b81cad9f SHA-256: 2e2b043444b0aaccb1a3529e38a72d25e779aeba34a8ffb62f893c03872c7365
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify, designed to appear as legitimate document downloads. One critical heuristic indicates a direct link to a known malicious redirector, 'ttraff.ru', which is used in conjunction with a search query for 'million dollar baby imdb parents guide'. This suggests a social engineering tactic to drive traffic to malicious infrastructure. No scripts were extracted from this sample.

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=million+dollar+baby+imdb+parents+guide
    • http://wutorusi.stylebysooph.com/uploads/1/3/1/1/131164312/9915539.pdf
    • http://files.flipconsultants.com/uploads/1/3/2/7/132712088/5727370.pdf
    • http://files.rejoicewithin.com/uploads/1/3/1/4/131406885/764254.pdf
    • http://files.glossopoeist.com/uploads/1/3/0/9/130968996/24e3d18af872.pdf
    • http://pivawovi.dilleybeansdaycare.com/uploads/1/3/1/3/131398140/kofumowebesid-ridegew.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0476/files/celestial_bodies_jokha_alharthi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9275/files/ketot.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3109/files/financial_accounting_dyckman_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8102/files/84867904346.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/jitasitepakegakomusaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6273/files/guvamef.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/21646842599.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5757/files/principles_of_teaching_and_learning_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/cambridge_english_advanced_2_examination_papers_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/0663/9779/files/75373127321.pdf
    • https://cdn.shopify.com/s/files/1/0430/0210/1923/files/gubazixok.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_off00006731.bin
3a8aee7ebd8fd2960e9bd963fc46b40298f5c10ef8d2ac7c7b2c35108b550172		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6731 5528 bytes
font_01_sfnt_off000079eb.bin
1ad6323352a57f7c47ae32c32e81f2d0b8bd9110348cb7328c767b01d51b97ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EB 10344 bytes

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