Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ce4b6dc8c35527…

MALICIOUS

PDF

48.5 KB Created: 2020-08-08 04:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5be10e946924d1c164dda332919d1a5 SHA-1: 57e6af675ef58091f150b2965f7d6e20ce7916ce SHA-256: d9ce4b6dc8c355270d6a6c234811ac260d3d0d01827ff08684c5f9eb3b71069e
150 Risk Score

Malware Insights

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

The PDF contains a deceptive link presented as '8x12 lean to shed plans pdf' which redirects to a known malicious URL (ttraff.cc). The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

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.cc/pify?keyword=8x12+lean+to+shed+plans+pdf
    • http://files.grandmau.com/uploads/1/3/1/4/131437799/taludumusufif-sogewoje-lalawuke-jugozewade.pdf
    • http://files.toxicfreephilly.org/uploads/1/3/1/4/131411896/d2ad2564b6d5.pdf
    • http://dotime.bulletinsusa.com/uploads/1/3/0/9/130969723/relisi-kokan-fupilejujelu-jamekisigi.pdf
    • http://votirok.icmindfulbirthing.com/uploads/1/3/1/3/131383791/9183794.pdf
    • http://files.choubijoudesign.com/uploads/1/3/1/4/131453944/2681255.pdf
    • https://cdn.shopify.com/s/files/1/0433/6307/4213/files/mitobifomofofunuwolujepu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9568/7328/files/understanding_analysis_abbott_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/19900027023.pdf
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/42._5_50.pdf
    • https://cdn.shopify.com/s/files/1/0431/8229/3141/files/wobajusamofubojekefigila.pdf
    • https://cdn.shopify.com/s/files/1/0432/3983/3763/files/low_tide_sanibel.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/fadudajaxud.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/botizabisor.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/tobijidimupikozewugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3880/1061/files/rakusokigikekojijonagiwi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1493/0084/files/fake_emails_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/60541806150.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/
    • https://cdn.shopify.com/s/files/1/0434/0586/9208/files/6

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073a1.bin
ab381dcffbcd26b71798943400d37847170b66daf527350c50509511828b4ec4
pdf-font-stream PDF embedded font (sfnt) at offset 0x73A1 5124 bytes
font_01_sfnt_off00008504.bin
6c0f774ec9d2782e2d46995db9d53d8c4257814eea9c8f4cdf68600a15a77f1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8504 9852 bytes
font_02_sfnt_off0000a6c1.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6C1 4324 bytes