Malicious PDF — malware analysis report

Static analysis result for SHA-256 324eb374e89447ba…

MALICIOUS

PDF

40.1 KB Created: 2020-08-07 09:23:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39100821a91fea9bb2d2d3dd7ffb5c48 SHA-1: 3e32e85d06c82449f8c9c672533921057c079554 SHA-256: 324eb374e89447ba6540639318c9c5d714994ee7a681ca1d2fd3aaf4d722081d
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the suspicious URL 'https://ttraff.com/pify?keyword=lp+orchitis+pdf'. This indicates the primary goal is to lure the user to a malicious site. The presence of numerous links, including to Shopify domains, suggests a link farm or SEO poisoning tactic to distribute the malicious payload.

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=lp+orchitis+pdf
    • http://files.poderezollaio.org/uploads/1/3/1/4/131438180/dfd41c.pdf
    • http://files.kontagious.net/uploads/1/3/1/3/131381612/faxalu-taxexosu-jikobusone-lupaxuxewa.pdf
    • http://files.karmicrescue.org/uploads/1/3/1/4/131406248/xujedurisufi-goxawirepagide-faxerut-saganebidalo.pdf
    • http://files.manuelmontanez.com/uploads/1/3/2/6/132682295/fixogiri-poboxuwufeze-rijurokutilovib.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/vijenipelixozadisuxojuki.pdf
    • https://cdn.shopify.com/s/files/1/0429/7857/4490/files/88844756333.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/kexokosupevitukuvif.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9645/files/fewejorujedexenukaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/wivutazojatazawakepepijad.pdf
    • https://cdn.shopify.com/s/files/1/0438/1851/6637/files/berliner_platz_3_neu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/vuladuzawup.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/77162335906.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/fire_guard_test.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_off00005fc9.bin
a971ce5e7df5b20fe1002025301dc2cb3f4940aba8f06dcaf1437650833a0449
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC9 4940 bytes
font_01_sfnt_off00007098.bin
f5c01899f67c8b63337fc14045b250f48103e1c0c3dac071e70373d5609abcc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7098 10500 bytes