Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0491f4c8151b6e…

MALICIOUS

PDF

41.9 KB Created: 2020-08-26 01:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ee4fe00c1af81f63f1b876fc15a4cc9 SHA-1: 969b0146df6e26c95f36396d8fd9c5ad74f12270 SHA-256: ab0491f4c8151b6e888e0b20c726aed6c29bbae71ec0b3062fc8e3cf02cb5b52
152 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 features a PDF link farm heuristic, indicating a large number of external links, many hosted on 'cdn.shopify.com'. The document body also contains the same malicious URL, reinforcing the lure for users to click on it. The ML classifier strongly flagged this PDF as malicious.

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=dehleez+pe+mere+dil+ki+mp3+free+download
    • http://files.phusikosskincare.com/uploads/1/3/0/7/130776599/4648655.pdf
    • http://fopazif.titansinvite.com/uploads/1/3/0/7/130776255/ramiwuzaju_tirotuz.pdf
    • http://files.metalicsafety.com/uploads/1/3/1/4/131453060/mawopivix.pdf
    • http://mikaze.thestyleofsubstance.com/uploads/1/3/1/8/131856190/16bc18bc722806.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5981/files/powerarchiver_free_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/8771/5742/files/xigox.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/warlock_demonology_talents.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/74324229892.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7423/files/98780686361.pdf
    • https://cdn.shopify.com/s/files/1/0432/0870/4164/files/smc_assistant_engineer_civil_paper_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0439/4234/6907/files/veriverop.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/tibibapunukobatokig.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/jusekanot.pdf
    • https://cdn.shopify.com/s/files/1/0435/6318/8383/files/51261719313.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/
    • https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056c1.bin
395cacfcbf7291a7df2ace2aecfaefc1ff0acaf695aeef03534e690fe2f2ed6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x56C1 5472 bytes
font_01_sfnt_off0000695f.bin
725817ce4f15b05a8754f3b03f4ed6c17a44ad61870b24473dc1c3b5310d9637
pdf-font-stream PDF embedded font (sfnt) at offset 0x695F 15176 bytes