Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccd95b1a3ac95c5…

MALICIOUS

PDF

48.1 KB Created: 2020-08-09 19:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61e0f26e0bc1d20e8f6e2141f982fe2e SHA-1: c1d58f8f7841baaa30d3978102f5ffc0cc787b1c SHA-256: 5ccd95b1a3ac95c5636c11775e1cc60ea1191006583dd7567075b5d4590eff9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body and embedded links suggest a lure to download further content, likely malicious. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO manipulation and traffic redirection.

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.ru/pify?keyword=anamika+academy+book+pdf
    • http://jikanosep.lakeconjola.org/uploads/1/3/0/8/130874493/4795373.pdf
    • http://files.musicboosterswinters.org/uploads/1/3/2/6/132683080/8574613.pdf
    • http://files.myphotographybyjess.com/uploads/1/3/1/4/131483201/629670b6d82f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/6371/3695/files/24715191846.pdf
    • https://cdn.shopify.com/s/files/1/0433/2139/3320/files/69108468583.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6983/files/14554998303.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0807/files/anthony_giddens_sociology_8th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/8285/8144/files/78631824387.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86556218032.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3421/files/data_communication_and_networking_tutorial_point.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/xanonafatuwugasape.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/pumirumevoxo.pdf
    • https://cdn.shopify.com/s/files/1/0445/9554/4228/files/ar_15_exploded_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54058680795.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000697a.bin
2ab6711179b6f846aa2aa51ad7a14090366ea2633234e98a4f579a26d4aa3d59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697A 5288 bytes
font_01_sfnt_off00007b79.bin
32fe10efcaa414224b189099b977856a62d0a11a6ffcaf28aead54f1a57e4bdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B79 10380 bytes
font_02_sfnt_off00009f15.bin
03deeb25ae3e9a84f8557a62252e8682586efb926dde5f6c7fb753ce6b1ade14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F15 5728 bytes

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