Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62b5ed2daf8f7d7…

MALICIOUS

PDF

98.0 KB Created: 2020-08-22 11:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23f800a5a629af7de944030f4f7ed703 SHA-1: e0afaea695af457dbb606d87229da4ecbdb10c9c SHA-256: c62b5ed2daf8f7d75e41f237ebda7c702d74b06a1a74dd985923c6b3ebbb4071
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link that points to ttraff.cc, a known malicious infrastructure. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also hosts a large number of external links, many pointing to shopify.com, which is indicative of a link farm SEO tactic to improve search engine ranking for malicious content.

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=regulation+of+flagellar+motility+during+biofilm+formation
    • http://files.lukefranco.org/uploads/1/3/1/8/131872178/923fc.pdf
    • http://files.greengardensevents.com/uploads/1/3/1/4/131406605/9832932.pdf
    • http://runeruz.shopredbluffroundup.com/uploads/1/3/1/4/131453130/3825473.pdf
    • http://files.crystalfallstradingco.com/uploads/1/3/1/8/131856271/toxagope.pdf
    • https://cdn.shopify.com/s/files/1/0431/0374/8263/files/acanthospermum_hispidum.pdf
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/makolomifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4997/5959/files/63731996189.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9753/files/pukixom.pdf
    • https://cdn.shopify.com/s/files/1/0462/0097/9606/files/http_game_guardian._net.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/student_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/45984938559.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/73002354698.pdf
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/relacion_entre_absorbancia_y_transmitancia.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/628081452.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/amharic_bible_free_for_desktop.pdf
    • https://cdn.shopify.com/s/files/1/0461/8960/9109/files/free_lagu_ariel_noah_jepang.pdf
    • https://cdn.shopify.com/s/files/1/0434/7795/8822/files/5251696195.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_off00013f73.bin
014505652ac02962d24b09ce647b02b1d40f6d7b3a8c371e268fa0bd4d17550d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F73 5296 bytes
font_01_sfnt_off00015173.bin
7f3f1b604bd1dbf99aeb5762d708bb235fbc38e4629ba88729ed17062cf6ea77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15173 12216 bytes

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