Malicious PDF — malware analysis report

Static analysis result for SHA-256 45cdb3d28ba4e4aa…

MALICIOUS

PDF

46.2 KB Created: 2020-08-22 23:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0fb62711e43eb075028865993541582 SHA-1: 8c14a191fb73e5875236ed2973c8268798e8a865 SHA-256: 45cdb3d28ba4e4aaf047bb64ef40f5e3b2cc5e76579b22e023a607a424a686ed
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, characteristic of a link farm. The primary malicious URL, https://ttraff.com/pify?keyword=solidworks+standard+parts, is likely used to funnel victims to a phishing or malware distribution site. The document body contains garbled text but includes the malicious URL and several benign-looking Shopify URLs, suggesting a lure to disguise the malicious intent.

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/pify?keyword=solidworks+standard+parts
    • http://files.simvs.com/uploads/1/3/1/4/131482950/c1a20452ebf35.pdf
    • http://tizilozes.stincrowvoden.com/uploads/1/3/0/9/130969280/zagirajukas.pdf
    • https://cdn.shopify.com/s/files/1/0436/8501/9801/files/python_3_string_replace.pdf
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/weekly_meal_planner_and_grocery_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/40947141626.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/cavaleiros_do_zodiaco_omega_dublado.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/cbx500_datalogic.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/wesus.pdf
    • https://cdn.shopify.com/s/files/1/0462/7949/1733/files/30857936769.pdf
    • https://cdn.shopify.com/s/files/1/0437/4131/5223/files/zasokitazugijanuzoxuwir.pdf
    • https://cdn.shopify.com/s/files/1/0428/2390/9532/files/72042790348.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_off00006bba.bin
b9fef1c9a59feb627b93ddd6b98e619bc42ba06eab4163d8dd66982b768db058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBA 4880 bytes
font_01_sfnt_off00007c5c.bin
1a8f8478e957f440d3e14a939eaa692f3d06762ce5bd8bb9cd8b4dcadce774b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5C 9888 bytes
font_02_sfnt_off00009e3a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3A 4324 bytes

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