Malicious PDF — malware analysis report

Static analysis result for SHA-256 0def2264471caafe…

MALICIOUS

PDF

35.8 KB Created: 2020-08-19 03:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 132b2941f0fe8c796f15b28d3b2c201c SHA-1: c9b5628656e254f9becd138f62dd62c74c087300 SHA-256: 0def2264471caafe108f1985c4ee2c2f936c9d3b3548c81a74f85a397030e555
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for a movie download, which likely leads to the malicious URL. The ML classifier strongly indicates maliciousness, supporting the attack pattern of using a malicious link within a document.

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=suddenly+20+full+movie+eng+sub
    • http://files.gracefulbeginnings.ca/uploads/1/3/0/7/130776075/merojo.pdf
    • http://kajox.sputterbird.com/uploads/1/3/1/4/131438137/kuzisu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0454/5072/3478/files/partitioning_thousands_hundreds_tens_and_units_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/hombres_en_guerra_alvah_bessie.pdf
    • https://cdn.shopify.com/s/files/1/0428/8954/3836/files/51956131455.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0709/files/vodomajupakobajuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4002/1407/files/blank_photo_frames_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/84379762739.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/rojusavomutirowapol.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0432/files/vokababax.pdf
    • https://cdn.shopify.com/s/files/1/0441/2529/0648/files/adaraya_agamaki_official_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/xatame.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/13370788987.pdf
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/the_history_of_love_nicole_krauss.pdf
    • https://cdn.shopify.com/s/files/1/0430/0341/2633/files/regewobabirilirizuzezupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4680/5408/files/nurowube.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d09.bin
9f037c4fa6d28e9dbe5d99943b7875742a1fbff896f3f176419df4cfb91d94fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D09 5600 bytes
font_01_sfnt_off00006012.bin
46913c0737ad3fb139d88cf302776211de267db3e98679de16350ca58fa4d509		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6012 10024 bytes

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