Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd601c9abb966d15…

MALICIOUS

PDF

57.4 KB Created: 2020-07-27 23:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1656713fbb697d32b58d12bcdf276f8b SHA-1: 6b7245701bb9373c654c896a04b9784fcc1507ba SHA-256: fd601c9abb966d153593f0d4efdef32112e0ea66a10aa90ab391076580d78644
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to language packs, suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to a malicious URL disguised as a helpful download.

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=arabic+language+pack+for+office+2013
    • http://files.secondchancepetsponsors.org/uploads/1/3/1/3/131379567/2170554.pdf
    • http://files.barvechess.in/uploads/1/3/1/4/131408086/be0cd76a.pdf
    • http://files.pastormikemoore.net/uploads/1/3/0/8/130814189/porenujenaf-tisexojaja-kuwawibil-zufome.pdf
    • http://files.pastormikemoore.net/uploads/1/3/0/8/130814189/porenujenaf-tisexoja
    • https://cdn.shopify.com/s/files/1/0431/0299/4586/files/11578184832.pdf
    • https://cdn.shopify.com/s/files/1/0435/9415/4146/files/mefawarelabatig.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/87863209326.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/bewolepedi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/85700367268.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/gosezibiwinafivig.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/15436128660.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/64188355682.pdf
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/94047876901.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/69083388904.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tolipokegegami.pdf
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/busoliragunazuro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/21336331478.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
stream_008_off0000b904.bin
5aeb9a0c6afef8a1ca8eb31e26f0327f60aeecbfc05537565a47770d1efad2cc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB904 19088 bytes
font_00_sfnt_off00007dc3.bin
cbe71e0c41feaa6badb224609209c457bd39fccbeec46415291b6d624d4298f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC3 5488 bytes
font_01_sfnt_off0000907d.bin
4079a02b2bf683036f97446b02c004ed7549856a52f25f740997ae49f21d9196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907D 12040 bytes

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