Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecab108bee54b53…

MALICIOUS

PDF

58.0 KB Created: 2020-08-21 04:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7523033bfa8d27a3a135c67f7c87ccb SHA-1: 20d6ac1fad400ed207c04cb48949e409151442e7 SHA-256: 2ecab108bee54b532a79a7753e5f2860910fc6d42a0736000189d12dbd254f38
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting it is an 'annual report' and includes the malicious URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the link's malicious nature, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, likely for SEO manipulation or to obscure the true destination. The ML classifier strongly flags this PDF as malicious.

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=britannia+industries+limited+annual+report
    • http://kekipez.macclesfieldpoolleague.com/uploads/1/3/1/4/131453416/xaxekivegutagevoxol.pdf
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/4387365824.pdf
    • https://cdn.shopify.com/s/files/1/0430/9988/1639/files/gitipafora.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/95371894927.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/dewuxopolavobewupozi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/impossible_quiz_answers_48.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/viguz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1703/4134/files/86812080281.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/kuwigizak.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/todefoxizipumumaz.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_off00009ed1.bin
f291ba73e63afbb5e5209e1e78dbaf7f34dcdb186710225f67e99f852cdbdaae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED1 5152 bytes
font_01_sfnt_off0000b037.bin
ea528bb425a3a30283b2045196351512d2c8b7d3b61d336b81316a4dfd47c120		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB037 12768 bytes

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