Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2beeed406b77fa…

MALICIOUS

PDF

39.9 KB Created: 2020-08-14 01:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 313f19d71b40847f8c83672450a85441 SHA-1: 278262fa88b83cf7706ca58ba851ef15cfadeef0 SHA-256: ea2beeed406b77fac90ea9cbc1fd7dc4162e65de5274473e7770882db2611cc0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at ttraff.com. The document body, though partially corrupted, suggests a lure related to 'production supervisor interview questions pdf'. The presence of a link farm heuristic further supports the malicious intent of directing users to external, potentially harmful, content. No scripts were extracted, but the PDF structure itself is weaponized for redirection.

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/wb?keyword=production%20supervisor%20interview%20questions%20pdf
    • http://files.isc-shippingconsultancy.com/uploads/1/3/1/6/131606487/5171686.pdf
    • http://files.betterhomeswithtlc.co.uk/uploads/1/3/1/6/131636889/tifel.pdf
    • http://tamod.al-miro.com/uploads/1/3/0/9/130969754/sezusilejomugegarep.pdf
    • http://files.robertsarwark.com/uploads/1/3/1/3/131380728/tumazipirilixute.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71860998709.pdf
    • https://cdn.shopify.com/s/files/1/0431/0381/3781/files/xuresovonilazilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3138/files/tolerudija.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/72663033043.pdf
    • https://cdn.shopify.com/s/files/1/0433/8951/7973/files/61259663582.pdf
    • https://cdn.shopify.com/s/files/1/0439/2108/0475/files/mcgraw_hill_dictionary_of_american_slang_and_colloquial_expressions.pdf
    • https://cdn.shopify.com/s/files/1/0432/2584/1819/files/ladefixalezibu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/tuwezewebedazagizababun.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/92273536151.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5201/files/wufarokon.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/36535393950.pdf
    • https://cdn.shopify.com/s/files/1/0435/7446/0579/files/42334173425.pdf
    • https://cdn.shopify.com/s/files/1/0433/4498/6280/files/91272946593.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_off00005da8.bin
acd8b4cadbbc894499e781bffd8eb2c4a4b4863e5cdd6daebb2982a77064b8b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA8 5184 bytes
font_01_sfnt_off00006f76.bin
1cfeb0e5eb8285e25cf54b1ea1e38676de3217b3a4dac43ac57567530baa9807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F76 10612 bytes

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