Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb1ca2ed17ffbaf3…

MALICIOUS

PDF

38.7 KB Created: 2020-08-02 10:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f1c27d855a14f2d646559682ade3412 SHA-1: 6a4abbe6590c005c279252838fa5123aba6a5661 SHA-256: fb1ca2ed17ffbaf3feea0fcf7a8e11f045286183a4d43156f50802f22bb30dae
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as a download for 'Age of Empires 2 HD Mac' which redirects to a malicious URL (ttraff.com). The document also contains a large number of external links, many hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=age+of+empires+2+hd+mac
    • http://files.autoinstallation.net/uploads/1/3/2/7/132710795/5160925.pdf
    • http://files.blessingrvpark.com/uploads/1/3/1/3/131379498/a67cb736dc06bd9.pdf
    • http://files.nottinghammassage.com/uploads/1/3/0/7/130739746/wufapexagu.pdf
    • http://files.jimpendergrass.com/uploads/1/3/2/8/132815961/xabixejeje-nenowapiwage-jisematonalon.pdf
    • http://files.charveypublications.com/uploads/1/3/1/3/131381363/990764da62ba4.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/41979390004.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/86194361352.pdf
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/senaxezafurosexabosuwuta.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1625/files/54110076393.pdf
    • https://cdn.shopify.com/s/files/1/0435/3317/2885/files/xiralujefujulekimewetapug.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/79213498522.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/18461713373.pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7591/files/rafefoxutalujo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1345/6550/files/3582152482.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53293114795.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2769/files/pipafed.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6244/files/18611278833.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_off0000583c.bin
4032bc22b2ca64962aa8dff99a9d94e71a32ac110a3b5a51d98d3a48c3c99651
pdf-font-stream PDF embedded font (sfnt) at offset 0x583C 5656 bytes
font_01_sfnt_off00006b59.bin
f5130b07c4ea832dc5e6dc8dd7e0abee12f373eb0dfe56af55bb37d99af2f3f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B59 10132 bytes