Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c422626dcc5bee…

MALICIOUS

PDF

46.7 KB Created: 2020-08-06 02:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c8b8675b043e871e79140329ef412db SHA-1: 53bad986686d1d7a6dca7423f0fd1a581c80f761 SHA-256: 31c422626dcc5beef240239a84b8270f5a85344bc7670a0734f1462120d47865
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised as a document about thermal conductivity. The PDF also hosts a large number of other PDF links, many on Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the primary attack vector is the malicious URL embedded within the document.

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=thermal+conductivity+of+metals+pdf
    • http://files.c3industriesllc.com/uploads/1/3/0/7/130776726/xufadujedus.pdf
    • http://files.mannaministries.org/uploads/1/3/1/4/131452735/susiguzura.pdf
    • http://files.kusummermusicfestival.com/uploads/1/3/0/9/130968921/jazuzimuzixap.pdf
    • http://files.close-review.com/uploads/1/3/2/8/132815220/7130315.pdf
    • http://puvisexu.fungusfanaticus.com/uploads/1/3/1/8/131871721/konepidubuval_mevonorikinuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/0811/5366/files/boluxomegerofewemidobadan.pdf
    • https://cdn.shopify.com/s/files/1/0433/2421/1354/files/xojutekaxomedipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/goramidikogikonajadaneko.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9560/files/ronugowukofovamotofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/mosomoru.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8049/files/somajadilalexukexamojesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdf
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/92418135037.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/sofaritelonor.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/xegituwonebogokoxezikila.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/zavalefapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/laxixekadatetuvalugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2499/7800/files/61911856657.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_off000077a6.bin
796cbbf85d2f7150d1ea97d1ac85779788211fbaa5d671b9df1e75892aad580e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A6 5508 bytes
font_01_sfnt_off00008a42.bin
181f526a40a410d5bdd71256c288a2f73c4dc62d0e5fb88f8021a728918ce89c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A42 10264 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.