Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c45fa95e510bd5a…

MALICIOUS

PDF

50.4 KB Created: 2020-08-19 02:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9269b30a98037582f0c2904e152a90b SHA-1: 5150fcf60eab3aa91434fd111af67f0e9e53067f SHA-256: 3c45fa95e510bd5aa20288f02ccb5741fc3d130c01edeb810c1e402b83e8fcb4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a heater manual. The document also functions as a link farm, hosting numerous PDFs on Shopify domains, likely to improve search engine ranking and distribute the malicious payload. The ML classifier strongly indicated maliciousness, supporting the observed redirection and link farm behavior.

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=bionaire+heater+bch9212+manual
    • http://logun.teganhanlon.com/uploads/1/3/0/7/130776561/8460754.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/xapoxetidibesakovurewa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1463/5165/files/39375239104.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/weniwoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1131/7658/files/8911859674.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/balancing_chemical_equations_worksheet_9th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0428/4317/7126/files/mcafee_antivirus_software_update_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/4161/2199/files/bozudo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/74222314495.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3304/files/maparolituganesubesilarop.pdf
    • https://cdn.shopify.com/s/files/1/0437/7224/8222/files/biliary_cystadenoma_case_report.pdf
    • https://cdn.shopify.com/s/files/1/0428/8223/6572/files/cvs_specialty_pharmacy_fax_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/tediwunedidezujebugirop.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d6.bin
cd8fe884af07607019ff2412e9e75f9afc9b5dc64b8836c98c1089e54433c7bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D6 5272 bytes
font_01_sfnt_off00007492.bin
55d4af003200133b617de2afe3570184bca30517c3223fbd864f6ca5654ab3e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7492 10672 bytes
font_02_sfnt_off000098a2.bin
b7438a48d3b698d515641637a16881a6e15eeb02264dfe2f19962986a87f7c12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98A2 16336 bytes
font_03_sfnt_off0000ae56.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE56 4324 bytes

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