Malicious PDF — malware analysis report

Static analysis result for SHA-256 150d97f8ec27dbd5…

MALICIOUS

PDF

39.9 KB Created: 2020-08-13 02:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a132c731b54ea5de4cb84e1f5109a1de SHA-1: f7fe5004c3356225b6799693052eceb4738d61e1 SHA-256: 150d97f8ec27dbd5043973b607de64c26b28b1bf2077724555698794541642d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document also hosts a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or scam attempt.

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.cc/pify?keyword=apologetics+pdf+books
    • http://files.theautismproject-flos.org/uploads/1/3/2/7/132741045/dopapon.pdf
    • http://files.miltonvthistory.org/uploads/1/3/1/4/131407459/4682392.pdf
    • http://files.westmauigreenway.org/uploads/1/3/1/4/131411542/bazimi.pdf
    • http://files.erinsmithlac.com/uploads/1/3/2/6/132681910/15caa91.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6984/0283/files/introduction_to_behavioral_economics.pdf
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/payment_receipt_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/3626/2050/files/kitajogakuxopeju.pdf
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/jafubuwumidorasakir.pdf
    • https://cdn.shopify.com/s/files/1/0449/0684/0231/files/surge_protection_device_schneider.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/fotid.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7529/files/29658614906.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peboginesewuxexadamo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/depuwi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/60359828753.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/nabovewero.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e52.bin
9e57dbdc365a990ada394b08f560e4e2f3e26684b40176cc5fbd3bfa99baf17b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E52 5208 bytes
font_01_sfnt_off00007022.bin
0519ee8ce703c081360eb85c029b33ca3ba202d3b5dd9fab5a83cb6d8d5a48b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7022 10192 bytes