Malicious PDF — malware analysis report

Static analysis result for SHA-256 8360b4d215b0cf90…

MALICIOUS

PDF

52.7 KB Created: 2020-08-28 20:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40791fe8d3938ac7e041a634a8526473 SHA-1: c5a5432c15e1c808cc882fe9f6f9e9ed834025f4 SHA-256: 8360b4d215b0cf90cd57663283c6e329973c316920865ccdd5a9e6e32290e2d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, disguised as a book download. The ML classifier strongly indicated maliciousness, and the PDF was flagged for linking to a redirector. The document body and embedded URLs support the lure of downloading a book, which ultimately leads to a malicious site.

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/wix?keyword=peshawar+nights+book+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_b321b21320a64d7cbcbbbf065576e80b.pdf
    • https://static.usrfiles.com/ugd/b8c837_146b08c34cde469494a55c87ba4bcac1.pdf
    • https://static.usrfiles.com/ugd/b8c837_757eb45f7b604307b38eaf564db98e1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_5706dc71ac81497597232a735f013d13.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6513/files/mudonukok.pdf
    • https://cdn.shopify.com/s/files/1/0428/5431/8239/files/wemebakeperewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6331/files/functional_analysis_mdu.pdf
    • https://cdn.shopify.com/s/files/1/0444/4412/3303/files/always_with_me_always_with_you_bass_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/0516/5216/files/oecd_transfer_pricing_guidelines_interquartile_range.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/lopizowugelirunotowuto.pdf
    • https://cdn.shopify.com/s/files/1/0435/8930/4477/files/naina_barse_rimjhim_video_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/fegeves.pdf
    • https://cdn.shopify.com/s/files/1/0430/3021/6855/files/negifobafiragizoxa.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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000097a8.bin
bae3ff10869a872f6d45081eeb1c95e231aad57ef8f6e19a1d2ae627c8e7c09a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x97A8 19580 bytes
font_00_sfnt_off00006259.bin
32fb14333018eef3df0993446a06cbb2d153688264a7456d9a8ac50be3763617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6259 5172 bytes
font_01_sfnt_off000073e7.bin
c2bdb4411f3fc64beae7c9d06f5a366ce7799134355a87c68f57d23f5355cb7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E7 10560 bytes
font_03_sfnt_off0000b79e.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB79E 4324 bytes

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