Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6154ec457fc1028…

MALICIOUS

PDF

34.2 KB Created: 2020-08-29 06:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9a3f26e089b630c1e818ddbd84b0699 SHA-1: 99288ede54e42388144712df1c02226255ccc138 SHA-256: d6154ec457fc1028b8dda74de88f52ea6dd047294b3d72093c1d58483b027be3
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the same URL found in the heuristic. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning technique to distribute malicious content. The primary malicious URL is ttraff.com, which is flagged as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=neset+ertas+evvelim+sen+oldun+indir
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/telumulewa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/65616394529.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0437/4711/5157/files/flivver_king_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0695/9514/files/british_gas_smart_meter_manual_top_up.pdf
    • https://cdn.shopify.com/s/files/1/0437/1306/9210/files/kemadisef.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/arteritis_kranial_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2690/files/binding_of_isaac_keeper.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0368/files/sisuxizaterimikorod.pdf
    • https://cdn.shopify.com/s/files/1/0461/8344/8730/files/anti_ragging_committee_members_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/23103366609.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/mixed_fraction_addition_subtraction_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/tonight_west_side_story_sheet_music_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_820a5227004c441c8dc8a2499c615489.pdf
    • https://static.usrfiles.com/ugd/b8c837_3558ea531d904c7cae5524ff6f351d94.pdf
    • https://static.usrfiles.com/ugd/b8c837_87cbba97ed3043f890761bdf6991f9dd.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_off0000483e.bin
cd517ed2189e276be9395bfd35c87a4091fdfbc827a3d9ab1f22743b59b14c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x483E 5000 bytes
font_01_sfnt_off00005928.bin
23a6ef5f15a67a454eee963a6342ce229405903b52167a98ce19662c57941716
pdf-font-stream PDF embedded font (sfnt) at offset 0x5928 10444 bytes