Malicious PDF — malware analysis report

Static analysis result for SHA-256 166f841751c27059…

MALICIOUS

PDF

87.9 KB Created: 2020-08-07 05:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48925dacd7b05ed0469fa4e68ed7a1b6 SHA-1: dd34cffbc1205162db549f876a7d74513423d61b SHA-256: 166f841751c2705919950a01c31ce424335abb59379c6464b43dc44370eb5cfc
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.cc/pify?keyword=sociological+perspective+on+culture+pdf'. It also exhibits characteristics of a link farm, with numerous external PDF links. The ML classifier strongly indicates maliciousness, and the embedded URL is the primary vector for the attack, likely leading to a phishing or malware download site.

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=sociological+perspective+on+culture+pdf
    • http://files.punchlinemarketing.com/uploads/1/3/1/3/131380008/b582e96c8.pdf
    • http://zesofaxug.detourla.com/uploads/1/3/1/6/131607062/5610902.pdf
    • http://files.eudaimoniatravelblog.com/uploads/1/3/1/3/131380592/wimajuxewig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/serikol.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/95303647089.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/gadivuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/3720/2344/files/minions_songs_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/92833678662.pdf
    • https://cdn.shopify.com/s/files/1/0430/8143/3242/files/gudakapuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/gejujefebidavovozivet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9531/files/magamazoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0432/0677/0843/files/tefirusozuxenabit.pdf
    • https://cdn.shopify.com/s/files/1/0435/0397/6614/files/wibun.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6163/files/91359516270.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_off00011bde.bin
fa166c44b429482194a2968598495e7a68dbd0e1c4d2bdfbaca9bd5bc6062754
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDE 5488 bytes
font_01_sfnt_off00012ea5.bin
586d345ff436dc0e4f5d60c99e901997847415f4a426c3ca1b23d537c6d25780
pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA5 10580 bytes