Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d7bf2ff3757813c…

MALICIOUS

PDF

38.7 KB Created: 2020-08-22 22:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21d283cd92e09f847905bb0ca63ca6aa SHA-1: 29cfaa3523aec7b04d685c4f89e517fbca5d1f4d SHA-256: 7d7bf2ff3757813cc99b87f65c814aba239ada281736fd4babaae2cfc09a899d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The primary intent appears to be luring the user to a malicious site via a deceptive link.

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=barsat+me+jab+aayega+video+song
    • http://files.beblessedwellness.com/uploads/1/3/1/3/131380031/vavapotosamuzunas.pdf
    • http://files.mrkohler.com/uploads/1/3/1/1/131163996/9129460.pdf
    • http://voxenivad.svhcva.org/uploads/1/3/1/1/131164250/777e2cc.pdf
    • http://files.angeliquelarson.com/uploads/1/3/1/4/131437685/lujopujakif.pdf
    • http://files.utahvalleymagicacademy.com/uploads/1/3/1/4/131411688/3ac0335.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4807/files/83407886034.pdf
    • https://cdn.shopify.com/s/files/1/0431/7301/9797/files/i_love_you_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/15058534923.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/fundamentals_of_complex_analysis_saff_snider.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/64923917748.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/block_matrix.pdf
    • https://cdn.shopify.com/s/files/1/0434/7848/3096/files/complex_numbers_class_11_target.pdf
    • https://cdn.shopify.com/s/files/1/0436/7063/4649/files/comprehension_passage_for_grade_8_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6889/1040/files/64653809206.pdf
    • https://cdn.shopify.com/s/files/1/0432/8230/1094/files/mugabilol.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/bokitomonodinixodemaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/tanixerebikowu.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_off00004b9b.bin
4b6f48b012fbd1e4a96ec92612259400f79b6be4c87adb2409505674ed4d6c8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B9B 5540 bytes
font_01_sfnt_off00005e68.bin
20e2b60208abbeee53dc3ab835a110c570426b9137cb94bfde8616c623731260
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E68 14532 bytes