Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d98dbbaedd8259…

MALICIOUS

PDF

36.2 KB Created: 2020-08-30 09:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2e856d6d3ff8cba0f9bf9f6b325f26f SHA-1: 905b534fc6335600157fe014c4e39f708eae7536 SHA-256: e1d98dbbaedd8259434eee025445a48ce2c63077525200559c5b6982553c2e48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=hanger+2+unblocked+games'. This URL is associated with known malicious infrastructure. The document also features a large number of embedded links, many pointing to cdn.shopify.com, which is flagged as a PDF link farm. The ML classifier 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.ru/wix?keyword=hanger+2+unblocked+games
    • https://static.usrfiles.com/ugd/b8c837_1b0978d96f8c45b39f765347f84a02ea.pdf
    • https://static.usrfiles.com/ugd/c1108c_a882019ffb084d81a75566c665fb2833.pdf
    • https://static.usrfiles.com/ugd/accd1f_7ff210c61e21478fa8d74d1225616bed.pdf
    • https://static.usrfiles.com/ugd/b8c837_b01fc56c381f4779bf5c7aad3101d6d4.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9029/files/76044547774.pdf
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/4038908988.pdf
    • https://cdn.shopify.com/s/files/1/0450/3732/2390/files/stock_certificate_template_microsoft_publisher.pdf
    • https://cdn.shopify.com/s/files/1/0430/4096/4759/files/3893113624.pdf
    • https://cdn.shopify.com/s/files/1/0437/3987/3429/files/riven_guide_aram.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9259/files/bushido_the_warrior_s_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2240/files/3154543050.pdf
    • https://cdn.shopify.com/s/files/1/0432/6719/5040/files/jijinumukuwetagi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/8th_grade_math_worksheets_kuta_software.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/5126321449.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042af.bin
79acfd853562726510f843fd3e28e1a3afb0f55f53959dd0c2de1ea391e68540
pdf-font-stream PDF embedded font (sfnt) at offset 0x42AF 5312 bytes
font_01_sfnt_off0000548f.bin
4fef49d33f975e69300a37d5a7845d1381a6d34217e6f82869c0878b4836c533
pdf-font-stream PDF embedded font (sfnt) at offset 0x548F 9876 bytes
font_02_sfnt_off0000763d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x763D 4324 bytes