Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a4cc356a4d2162…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 14:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9a2c6a9db67afe7480eb5d7582bf516 SHA-1: 1e5518567d5d569a27f805d48e6222a048023a52 SHA-256: 75a4cc356a4d21622da0728f2a56a38f1e19d863503b68da59b39e83ce1fd95c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 1966 Ford Mustang manual. The document also exhibits characteristics of a link farm, with numerous embedded links to PDF files hosted on Shopify. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to drive traffic to malicious sites.

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/wix?keyword=1966+ford+mustang+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1143/1838/files/monk_stat_priority.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/73376035495.pdf
    • https://cdn.shopify.com/s/files/1/0433/1143/1838/files/ben_10_games_for_android_psp.pdf
    • https://cdn.shopify.com/s/files/1/0461/7250/4227/files/datepicker_format_react_native.pdf
    • https://cdn.shopify.com/s/files/1/0440/7151/8373/files/jolofewagivuperefi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/pamofabinosotegemokixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6482/files/boogie_nights_song.pdf
    • https://cdn.shopify.com/s/files/1/0464/9127/1320/files/private_parts_images.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7248/files/32869955201.pdf
    • https://cdn.shopify.com/s/files/1/0434/1671/5429/files/wakesataniz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/fuvibafubasepewe.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/69051302680.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_off00006376.bin
0720b30aecc6b8e54cf86f03077b329233e0f5526f2ba1a10c899870da621cf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6376 5496 bytes
font_01_sfnt_off00007601.bin
8bf6ae107e3dc2f9000e280f6368a2080b60f7b733cb9ceb7159f1c391920db4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7601 10536 bytes