Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0db367d211bfa2…

MALICIOUS

PDF

42.3 KB Created: 2020-08-10 22:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbe9124aa720f634af7968f4ccf16294 SHA-1: f2bc79162a515ddaf72c283057ca26728ac2d108 SHA-256: 8c0db367d211bfa268c8e7bebf2ce2be4cafe84ab77883958f9a1f8fff2bb9b4
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests the document is designed as a link farm to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a lure disguised as a book PDF, directing users to a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=isabel+allende+the+island+beneath+the+sea+pdf
    • http://files.gtectrain.com/uploads/1/3/0/8/130813301/3595540.pdf
    • http://files.wesleyheightsliving.org/uploads/1/3/0/7/130739393/mikevox.pdf
    • http://files.northernirelandteacher.com/uploads/1/3/0/8/130813757/b00f3d00.pdf
    • http://files.deborahrundle.com/uploads/1/3/0/9/130969577/judijib.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/90179440592.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/11931702889.pdf
    • https://cdn.shopify.com/s/files/1/0433/7418/2563/files/99974933115.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5616/files/jazumaposilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/the_noble_art_of_seducing.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/fairy_tales_with_pictures_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0450/8103/4917/files/planeta_iptv_roku_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6917/files/1_year_in_seconds.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/babape.pdf
    • https://cdn.shopify.com/s/files/1/0439/0813/7128/files/bromatologija_knjiga.pdf
    • https://cdn.shopify.com/s/files/1/0438/0111/6833/files/68390168402.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/abba_dancing_queen_lyrics.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_off000068bb.bin
808648609da88123c5bd0a10a5528fc0d51c872aa6932bfcc979aae811eecdc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BB 5112 bytes
font_01_sfnt_off00007a0b.bin
4f1d165fa2db6606531be7454f8ad3ac9fbc681f54087c071b8d0f4d9919df8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0B 9924 bytes

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