Malicious PDF — malware analysis report

Static analysis result for SHA-256 7487b9e382f01d2a…

MALICIOUS

PDF

62.6 KB Created: 2020-08-22 16:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c746d260e14f24d52e2f9c70139745d3 SHA-1: 38852635ead1ac0ee0d2f4bbf7440c9b8820b0b7 SHA-256: 7487b9e382f01d2a67a80280aa2cba2837642d832d82cf64fa2001ca579ee024
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=contract+management+database+template+access', is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous links pointing to external PDFs, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly indicates malicious intent.

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=contract+management+database+template+access
    • http://kibezixon.mzsacredhealing.com/uploads/1/3/1/4/131453872/5855726.pdf
    • http://files.laurenandmikeries.com/uploads/1/3/1/3/131380001/617676.pdf
    • http://files.bellefitnesslifestyle.com/uploads/1/3/0/7/130776159/rozavivomofisotizu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0886/0065/files/88971916320.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/wizatevom.pdf
    • https://cdn.shopify.com/s/files/1/0438/5685/5190/files/solucion_isotonica_hipotonica_e_hipertonica.pdf
    • https://cdn.shopify.com/s/files/1/0433/2489/9496/files/75520169427.pdf
    • https://cdn.shopify.com/s/files/1/0438/7402/5640/files/enqueue_wordpress_stylesheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/3758/1734/files/zukaguzovesogokuxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/88136004092.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/59327148630.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/5622365539.pdf
    • https://cdn.shopify.com/s/files/1/0437/4436/2647/files/47889025131.pdf
    • https://cdn.shopify.com/s/files/1/0437/2715/9448/files/59534877586.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_off0000b794.bin
fa866cd24b20f3986bee606d82503dfffd90a1a081ae606902670f803152681e
pdf-font-stream PDF embedded font (sfnt) at offset 0xB794 5436 bytes
font_01_sfnt_off0000c9ed.bin
a6e6f2f0f8850f299978cac05e29795a4ac42eaf71d1d16de9054b1009ed8cb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9ED 10256 bytes