Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a8a622906a9dc1…

MALICIOUS

PDF

38.5 KB Created: 2020-08-07 07:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b928b9d915e8ba2e222fa45940f8492 SHA-1: 2c0002fd112709d553274938f687f7c05a99aee2 SHA-256: a1a8a622906a9dc140893ed89d6fb24544a2c1320e4ab1416ed5abb81cddd0ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/wb?keyword=manuale%20in%20italiano%20di%20logic%20pro%20x', is designed to lure users by appearing to offer a manual for 'logic pro x'. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted, but the primary attack vector is the malicious URL embedded within the document.

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/wb?keyword=manuale%20in%20italiano%20di%20logic%20pro%20x
    • http://files.fustlerthefemalehustler.com/uploads/1/3/0/7/130739839/gaxiwoloxakutenuboj.pdf
    • http://files.nomadshopdc.com/uploads/1/3/1/4/131408369/ganopewikatifupaf.pdf
    • http://files.800globalhealthcoaches.com/uploads/1/3/1/0/131070289/4907763.pdf
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/kuxuful.pdf
    • https://cdn.shopify.com/s/files/1/0433/3522/1403/files/r_piracy_megathread.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/janitanupikipegigeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/10238384598.pdf
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/nesoputane.pdf
    • https://cdn.shopify.com/s/files/1/0433/6615/4394/files/70623955484.pdf
    • https://cdn.shopify.com/s/files/1/0437/9344/9122/files/55683499068.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/12827915543.pdf
    • https://cdn.shopify.com/s/files/1/0434/1055/5047/files/xopol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/edgerouter_edgemax_forum.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/23296855891.pdf
    • https://cdn.shopify.com/s/files/1/0436/0467/2675/files/28157203440.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057fb.bin
db416742f2ebe851c9395ddf897e222fd9930e6ff487d676e12d94fb8dd83f79
pdf-font-stream PDF embedded font (sfnt) at offset 0x57FB 5136 bytes
font_01_sfnt_off0000699a.bin
638faa713bffe6a99b616010a95f68e6a04dd351969ec9d098b8589d0522bf54
pdf-font-stream PDF embedded font (sfnt) at offset 0x699A 10432 bytes