Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e677dade4e4828…

MALICIOUS

PDF

44.9 KB Created: 2020-08-21 14:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b96f86da237b5ddd58bdc9fd2401041 SHA-1: c051c6f287a216162139cf4c72d3b9255f3c91e7 SHA-256: 20e677dade4e4828d31bdb62d4ab77ca1b426f3f8b658c90a47847f269cb79cc
128 Risk Score

Malware Insights

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

The PDF file contains a lure suggesting free ebooks, as indicated by the 'SE_INVOICE_LURE' heuristic and the document body text. It embeds numerous links, with the primary malicious link identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic pointing to 'https://ttraff.cc/pify?keyword=basic+electrical+engineering+ebooks+free++pdf'. The 'PDF_SEO_LINK_FARM' heuristic also notes a large number of external PDF links, suggesting a broader distribution or SEO manipulation tactic. No scripts were extracted from this sample.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.cc/pify?keyword=basic+electrical+engineering+ebooks+free++pdf
    • http://files.anydogildorescue.org/uploads/1/3/2/7/132740900/rasijikiguno-tidenekaleruvaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/75720311280.pdf
    • https://cdn.shopify.com/s/files/1/0461/4180/0601/files/install_apk_in_bluestacks_mac.pdf
    • https://cdn.shopify.com/s/files/1/0435/5876/4696/files/favupikisujoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6017/3717/files/rexidegujavekowowapukama.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/3041555219.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/circle_people_skins.pdf
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/barzanji_marhaban.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_off000063d1.bin
e2668efde42ef353c8c7efc0f9be236cf28e24c4bb928f8ee076d2db5a904c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 5364 bytes
font_01_sfnt_off00007604.bin
d4aa43be467b3a197c3ad12050f476f766bdf93a8ac277898c8c6c3f15e668d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7604 10188 bytes
font_02_sfnt_off000098bd.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98BD 4324 bytes

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