Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff0ddde6ebe67ba…

MALICIOUS

PDF

57.3 KB Created: 2020-08-05 16:41:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b8dcdd71b6a4844e0e8b4f6eddbeb5b SHA-1: 0f1b93cbbfdab53645ec784435c3c94676f2e5c5 SHA-256: 1ff0ddde6ebe67ba573e8833a90b85ab3e0d5af5971953a88fe353c8a386e4f9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

This PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body itself is heavily obfuscated but contains the same redirector URL and a list of other PDF links, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is https://ttraff.com/pify?keyword=d+d+5e+barbarian+character+sheet+pdf, which is presented as a Dungeons & Dragons character sheet to lure users into clicking.

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=d+d+5e+barbarian+character+sheet+pdf
    • http://files.timberlinetrailandnature.com/uploads/1/3/2/6/132696598/denofipuwe-dulapa-zuludesa-nerani.pdf
    • http://files.tactdrama.com/uploads/1/3/1/3/131398184/ddee889710029.pdf
    • http://vopipenux.vetrehabcenter.com/uploads/1/3/2/6/132683328/9714677.pdf
    • http://files.celiatabitha.com/uploads/1/3/0/8/130814043/e228bb09.pdf
    • http://files.keetoncorrections.com/uploads/1/3/0/7/130776819/352bd.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/kivijigorerukadakaves.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/64699822721.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/human_anatomy_4th_edition_mckinley.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/basic_electrical_engineering_mcq.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/55744055501.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/dakibodeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/51858906226.pdf
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/28832066054.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/podifikefopufijumevezames.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/53517191427.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/puneson.pdf
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/bodozebixaxonur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.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_off0000a22d.bin
c3cf55799ff4abd31325d1aa2d6080f15bdae9a9cec2fc227c577a4c92197b1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA22D 5476 bytes
font_01_sfnt_off0000b4c5.bin
d2e634ea6ec6d40d26f2dddc01d6a5b086c707abb2a8bac6bda23419b3049dba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C5 10372 bytes

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