Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a133860ccba720a…

MALICIOUS

PDF

44.4 KB Created: 2020-08-23 16:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fd1c3ac7bc310f3a1b6256736474972 SHA-1: 78d7064d5538cfc4f06895de6d7ad17b44926e33 SHA-256: 2a133860ccba720ab2e083c08941644b8bc62fe274029d7b90f30a360dd713c3
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains a reference to 'flannel sheet set queen walmart' and the malicious URL, suggesting a lure to a phishing or scam page. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms a malicious intent to direct the user to a harmful site.

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=flannel+sheet+set+queen+walmart
    • http://povazul.ggsdesigns.net/uploads/1/3/1/0/131070197/464d6b545b02a1b.pdf
    • http://safel.soakitupfranklinma.org/uploads/1/3/1/4/131453870/dc7229f4e.pdf
    • http://pudewovu.gametimesportschesterfield.com/uploads/1/3/1/8/131856257/4438051.pdf
    • http://figim.starmembership.org/uploads/1/3/1/4/131437689/tejozujajeb-kunodavumumo-kakakib.pdf
    • http://files.chocolatemilkart.com/uploads/1/3/1/4/131406258/9671829.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/22472779187.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/9330987579.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/saving_private_ryan_screenplay.pdf
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/21641405635.pdf
    • https://cdn.shopify.com/s/files/1/0430/8788/8535/files/apm_terminal_e_form_13.pdf
    • https://cdn.shopify.com/s/files/1/0428/0634/5895/files/xumaki.pdf
    • https://cdn.shopify.com/s/files/1/0437/0238/6856/files/3d_origami_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/clinical_pharmacokinetics_pharmacy_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/fakezunuxediludowifanik.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/xifoluwolamizama.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_off00006335.bin
3527becaf9750d3a11cee5af26666b82bda0130a4caa657d7eb6bdb7bdcacd42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6335 4820 bytes
font_01_sfnt_off0000736e.bin
63b4d9bb34a2937e65ea7d92cb9a2a94048c195818fa8247112bb216090290a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736E 10292 bytes
font_02_sfnt_off000096b4.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96B4 4324 bytes

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