Malicious PDF — malware analysis report

Static analysis result for SHA-256 6feb4e56f47cd7c1…

MALICIOUS

PDF

51.0 KB Created: 2020-08-05 04:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50c54e847c2696d4cfa4cbdd3fb74c79 SHA-1: 7062e870852f15ed560ba2d24ed102b0c2328335 SHA-256: 6feb4e56f47cd7c1826429caa897b586dd7f2fe7a9ca7626a39a712ce425f06c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure malicious destinations. The primary redirector URL, https://ttraff.com/pify?keyword=atkinson+achievement+motivation+theory+pdf, is flagged as malicious. This suggests the document is part of a link farm or SEO poisoning campaign to lure users to malicious sites, likely distributed via spearphishing.

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=atkinson+achievement+motivation+theory+pdf
    • http://files.platypire.com/uploads/1/3/0/7/130739095/vogupuvegivimup-lonimidomituja.pdf
    • http://files.intheribbonsshowclothing.com/uploads/1/3/1/3/131380870/3ea8faf.pdf
    • http://files.essexelks.org/uploads/1/3/2/7/132740249/9833405.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88490435411.pdf
    • https://cdn.shopify.com/s/files/1/0448/0460/4066/files/sans_tootsie_roll.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/79282333342.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/80729761629.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5423/files/47808822982.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8909/files/dapuzuwopifojejidizo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5738/8439/files/94306810392.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/acca_f9_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/58850992013.pdf
    • https://cdn.shopify.com/s/files/1/0434/0501/7238/files/rebinebo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/weraloxejizidareler.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_off000089d2.bin
4d8f1cf46f23f5e3e0f2225827d1f9ee1ec47ce0f7e1cf9721f003be5f13668e
pdf-font-stream PDF embedded font (sfnt) at offset 0x89D2 5580 bytes
font_01_sfnt_off00009cb8.bin
5ebeb6ff1c6aacb65422c0d464f3fbb9f93f33a652904d9b732aad685b304ef2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB8 10044 bytes