Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c31d47d703addf…

MALICIOUS

PDF

44.3 KB Created: 2020-08-30 20:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32bfa950123d6f93bbb1ba32ec9a4433 SHA-1: fbb102065d323363a2d31aa297dcbaa79b4bf96b SHA-256: d8c31d47d703addf84c4038c588fa815370cb3027ba1ef7296f6eac3f6b7e0be
152 Risk Score

Malware Insights

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

This PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector at ttraff.com. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of links and the presence of a malicious redirector are strong indicators of a malicious intent, likely to lead users to further malicious content or phishing 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.com/wix?keyword=regar+as+plantas+com+vinho+menu
    • https://cdn.shopify.com/s/files/1/0440/3937/2965/files/carbon_copy_cloner_dmg.pdf
    • https://cdn.shopify.com/s/files/1/0432/3809/7051/files/jurnal_asidosis_metabolik.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1049/files/ruzadowavufamebubegofozez.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/vidmate_hd_video_music_er_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4870/files/sebusifa.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/49560079848.pdf
    • https://cdn.shopify.com/s/files/1/0437/8941/8647/files/68898813246.pdf
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/jonaniboxaxunivipexive.pdf
    • https://static.usrfiles.com/ugd/756799_a6c67ff2f5f147d8a54e3304c7a0d330.pdf
    • https://static.usrfiles.com/ugd/b8c837_9205e142f72a4937a5e236e07320cc8b.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/blastomyces_dermatitidis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/lodulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/descargar_minecraft_0.14.0_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e6d.bin
362113a8f10aa5b50c759680688fe5c660b2328941ac94887f9e191ce6b6e42a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6D 5296 bytes
font_01_sfnt_off00007049.bin
ff42a3f47342b7dd675a1877f6b83e0e406978ce9a37667c555766b34e4c33bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7049 12012 bytes
font_02_sfnt_off00009499.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9499 4324 bytes