Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f02f3cd3d0325d…

MALICIOUS

PDF

48.2 KB Created: 2020-08-07 06:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc6065530a5e74d2cae044c95e01f3a3 SHA-1: f838252cdb66061b6f1851e3e481c02036abb98c SHA-256: 44f02f3cd3d0325d07d4104b4d60af22ca1ac85f0fa683cfb4838493b5113771
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, but also includes a critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same malicious URL and appears to be a lure related to 'ataxia cerebelosa pediatria pdf'. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for phishing or malware delivery.

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=ataxia+cerebelosa+pediatria+pdf
    • http://files.tifihair.net/uploads/1/3/1/4/131406893/5c8e7892.pdf
    • http://files.volunteerfirefightersassociationoklahoma.org/uploads/1/3/1/4/131437685/talapepurunekap.pdf
    • http://wajivekot.openstudiotours.com/uploads/1/3/1/1/131163635/a617d65caa5b55e.pdf
    • http://files.grundmeyerleadersearch.com/uploads/1/3/1/6/131636990/sifixoj_jutixepipi_bevasagipaxuja_sivosukisozi.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/dosazadepubuwox.pdf
    • https://cdn.shopify.com/s/files/1/0428/1057/2967/files/gaboxor.pdf
    • https://cdn.shopify.com/s/files/1/0435/6515/4463/files/bloodborne_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/fistula_ani.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/new_hire_reporting_florida.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6349/files/seeing_ourselves_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4954/1017/files/adding_and_subtracting_fractions_worksheets_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/27898096693.pdf
    • https://cdn.shopify.com/s/files/1/0447/4676/8535/files/synonyme_finden.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/the_walking_dead_comics_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/negukenajapukupo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0802/3966/files/jesanakifaxox.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007889.bin
4a304b0810cfa9b1c61815d9d00c39120cd9f82663f0d47e6c98325d910f25ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7889 5348 bytes
font_01_sfnt_off00008ac3.bin
384ca5508666609b98c8f2491e7c5dbbe98dc3f4fa35aac6b69c1ff7143d1944		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC3 12772 bytes

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