Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c9d6280a7fcc48…

MALICIOUS

PDF

53.9 KB Created: 2020-08-08 23:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcb62d4db078e89a0f0866be43583afd SHA-1: 4e2a9872319fe4116a3c453fffe06c63f5e239ce SHA-256: 29c9d6280a7fcc48bcf6bd10146f180070d670e6d5e32ec2bb580e0ee7c66b0b
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the target URL and appears to be a lure related to an 'aldehydes and ketones experiment'. The PDF also hosts a large number of external links, suggesting a link farm for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged 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.cc/pify?keyword=aldehydes+and+ketones+experiment+pdf
    • http://files.loyandrus.com/uploads/1/3/0/9/130969489/gozekodopejifijajatu.pdf
    • http://files.acadianaplumbersassociation.com/uploads/1/3/2/7/132710601/patemoxew-zewiwepogasose-nokaz-pawivemobim.pdf
    • http://rasabo.cedarvalleywalleyeclub.org/uploads/1/3/1/6/131606289/jejixanuwumevixelo.pdf
    • http://files.inciteeducation.com/uploads/1/3/1/4/131438142/fipugel.pdf
    • http://files.mikelipari.com/uploads/1/3/1/6/131606109/zufutafo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/vuwusegaluvozuwudumuligi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1218/files/bullwhip_effect_definition.pdf
    • https://cdn.shopify.com/s/files/1/0452/6263/5168/files/alloys_of_copper.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3704/files/49980928525.pdf
    • https://cdn.shopify.com/s/files/1/0432/6516/3422/files/dameriratavoderuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/9267/9582/files/babos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9340/1501/files/69407519091.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/antropologia_cultural.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/dawevigapobodepuwam.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9308/files/kejolosidugovaruritigej.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/95033734376.pdf
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/musebupapuvafuzakevepuf.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_off000084df.bin
4629673eb92bea3c365cb80dd08d76d7e1881c7fc781de0be6f429edeae1b6e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DF 5292 bytes
font_01_sfnt_off000096b0.bin
9f620948b552d6539ea78edc5934ebc7a9871900294355e20ebb6c5da49a3fe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96B0 11112 bytes
font_02_sfnt_off0000bca0.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA0 4324 bytes

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