Malicious PDF — malware analysis report

Static analysis result for SHA-256 753f62ff358e2075…

MALICIOUS

PDF

74.1 KB Created: 2020-08-11 07:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5e5cf15120abd3b068a1b02a4b56765 SHA-1: a3f11b1f237c88b611168ecb80cedcd9ab5fb87d SHA-256: 753f62ff358e207537d0f7c0ad94e339166b72db0e7f9262900349ca4eac7862
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text and URLs that suggest a lure to download further content. The presence of a malicious redirector and a link farm indicates an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.cc/pify?keyword=metabolomics+applications+pdf
    • http://files.pierpontchurch.com/uploads/1/3/0/7/130739970/4673029.pdf
    • http://jivunekid.spcwaterdistrict.com/uploads/1/3/1/6/131606248/5738724.pdf
    • http://sokode.lacindra.com/uploads/1/3/1/4/131407089/0ab7c94494348.pdf
    • http://files.therandytravisfoundation.org/uploads/1/3/1/0/131070688/soterava.pdf
    • http://files.elitegolfcartrentals.com/uploads/1/3/0/7/130739991/35bc77b74347ae.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6574/5309/files/electronics_projects.pdf
    • https://cdn.shopify.com/s/files/1/0435/4313/4362/files/payroll_tax_act_nsw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0438/8628/0872/files/tomonaxegopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1565/9942/files/nfl_week_3.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/67768810610.pdf
    • https://cdn.shopify.com/s/files/1/0437/4000/4501/files/xupawoxuveg.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1064/files/35171593562.pdf
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/zudamowonod.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/mafofasaxosugegi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/artemia_franciscana.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/gunavakud.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0f3.bin
d372f654ccbfe4a8bd8e13c3cc91bf9f05fd3ed51430e6f1a3bfbaa3e19ffb17		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F3 5348 bytes
font_01_sfnt_off0000f314.bin
b556367784a4b074f834e5118a671518ea0709b9158adc9f17eb35509d8ad9ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF314 11928 bytes

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