Malicious PDF — malware analysis report

Static analysis result for SHA-256 782fd0c41fed0ea7…

MALICIOUS

PDF

61.9 KB Created: 2020-08-26 19:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cd3e4a735c298b206b501782e406c8c SHA-1: 170d62aec148a5f28c1a595d1bc493c7fd9d8cce SHA-256: 782fd0c41fed0ea74954ae154bb8bb08b2c8bbb855f8951868940985a9d7757c
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=advanced+cicerone+study+guide'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on domains like cdn.shopify.com and others. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary goal is to redirect the user to a malicious site, likely for phishing or malware distribution.

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=advanced+cicerone+study+guide
    • http://files.moriahit.com/uploads/1/3/0/7/130776225/xorozoxekedu-wewuxubewog-labujoj.pdf
    • http://files.gumbeerfest.co.uk/uploads/1/3/1/6/131606965/gusafozenidu.pdf
    • http://files.maximsdogue.com/uploads/1/3/1/8/131856186/menodonu.pdf
    • https://cdn.shopify.com/s/files/1/0441/1441/1672/files/suraritinezetobik.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/sqlite_for_windows_xp_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/tenowut.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/656348901.pdf
    • https://cdn.shopify.com/s/files/1/0438/4984/2850/files/viber_for_samsung_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/3452/6375/files/lagexoziremodefobuzim.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3556/files/fusidolunifolisuneviji.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/79421037077.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/susuzanepepotoniwisaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6116/files/35224574322.pdf
    • https://cdn.shopify.com/s/files/1/0440/3222/9541/files/kilirugo.pdf
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/chaotic_sword_god.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_off0000b20c.bin
4f956c961fbf8c8ed6f233cc41a328748e6bd363721f081661ebe66a2b5a26d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xB20C 5228 bytes
font_01_sfnt_off0000c3e7.bin
af145fbb26d22e02006a8f8afc8c9d95c254f355b029ee5de25896017c80aa08
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E7 11196 bytes