Malicious PDF — malware analysis report

Static analysis result for SHA-256 773839e545e53266…

MALICIOUS

PDF

54.6 KB Created: 2020-08-01 13:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bec6f3207baabcdb7e6607fc163a8ca2 SHA-1: 4c05f62da5f34909964e07fdd211cf4bbcb61f15 SHA-256: 773839e545e5326679c3fcd0bb81a66c2479c4294948e9fcad3941f2de6c4c7b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link pointing to ttraff.com, which is flagged as malicious infrastructure. It also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL and keywords suggesting a lure for a 'software project survival guide'. The primary attack vector appears to be users being tricked into clicking the malicious link.

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=software+project+survival+guide+pdf
    • http://files.maceymania.com/uploads/1/3/1/4/131406222/7877367.pdf
    • http://files.behomewreckerstogether.com/uploads/1/3/0/9/130969354/9fd120b.pdf
    • http://files.breathelaughlove.com/uploads/1/3/0/7/130738652/fd6a64f4.pdf
    • http://files.taralynashley.com/uploads/1/3/0/7/130740323/bosepi_zikawosi_sezanarisof_ludariru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/89624228077.pdf
    • https://cdn.shopify.com/s/files/1/0437/8460/1752/files/dufesazukukanewu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/37770278187.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/lareritevapo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/67280215612.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/23533406960.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8306/files/71808232347.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/29012225314.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.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_off0000971a.bin
fbf18846f6d3a3ab71ac460c3604d2d408ddd86a91ec210e14899af2db29dc6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x971A 5656 bytes
font_01_sfnt_off0000aa89.bin
5ff10fc15cd09c00cf0dffae53a5ecbc9868f6b82770b812e25ccc6577d3a88b
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA89 10432 bytes