Malicious PDF — malware analysis report

Static analysis result for SHA-256 29842f58247805e4…

MALICIOUS

PDF

43.6 KB Created: 2020-08-02 23:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d37ef2480b3a9c2ae2ffb4fbd451201 SHA-1: c0c06b0b4e7d5b412ec265f11963c4ed87920077 SHA-256: 29842f58247805e474ca6e8392b6341ac60842e20f7f8ec6e594b8fc08367626
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning model and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a PDF link farm, suggesting a tactic to artificially inflate search engine results or distribute malicious content. The document body contains the URL https://ttraff.com/pify?keyword=1-+99+smithing, which is a known malicious redirector.

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=1-+99+smithing
    • http://files.pclawoffice.com/uploads/1/3/2/3/132303170/f7da99f55a4.pdf
    • http://files.bluesandcompany.com/uploads/1/3/1/8/131857920/xebekutemafugafiti.pdf
    • http://files.loadbrook.co.uk/uploads/1/3/0/9/130969700/abd7c8f27372f46.pdf
    • http://files.pop-wuj.org/uploads/1/3/1/3/131383358/zuwizidawew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0985/8984/files/suvitej.pdf
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/73493593627.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0437/5625/7441/files/kavom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jewepogepavab.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/84981867826.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/54111959620.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/jaravadenolawefijaka.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/fokedorot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21617342462.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_off0000662d.bin
a083a84cbe07f0c409343b7bc1a80dc991beb8cac51af76afe183d3c732ea8df
pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 4908 bytes
font_01_sfnt_off000076cc.bin
7a475129505b8ad9bda65b3d99af4c42b81fc888391376eb2332a7431524d7b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x76CC 13636 bytes