Malicious PDF — malware analysis report

Static analysis result for SHA-256 013cebcd0793d5ae…

MALICIOUS

PDF

45.4 KB Created: 2020-08-02 21:25:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab930514446f28b9fbdb7da554a6de3d SHA-1: 82d020345898299702abbc0819cc817280a67785 SHA-256: 013cebcd0793d5aeb8ab4d1efb6fe4722eb90ad07561aee6d6c91f32e472c62f
154 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is likely used to redirect users to further malicious content, potentially for phishing or malware delivery.

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=%25D1%2580%25D0%25B0%25D1%2581%25D0%25BF%25D0%25B8%25D1%2581%25D0%25B0%25D0%25BD%25D0%25B8%25D0%25B5+%25D1%2587%25D0%25B5%25D0%25BC%25D0%25BF%25D0%25B8%25D0%25BE%25D0%25BD%25D0%25B0%25D1%2582%25D0%25B0+%25D0%25BC%25D0%25B8%25D1%2580%25D0%25B0+%25D0%25BF%25D0%25BE+%25D1%2584%25D1%2583%25D1%2582%25D0%25B1%25D0%25BE%25D0%25BB%25D1%2583+2018
    • http://files.artypantsstudiott.com/uploads/1/3/0/7/130739970/17482cba57.pdf
    • http://files.marikym.com/uploads/1/3/0/7/130740433/mufilajidunom_senukipiboxalan.pdf
    • http://files.southeasternpaleoamerican.org/uploads/1/3/1/3/131380476/5704910.pdf
    • http://files.andrekey.com/uploads/1/3/1/3/131379290/330c57542fb69d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/0006/2371/files/dumav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wemulaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/45750130688.pdf
    • https://cdn.shopify.com/s/files/1/0431/2173/7882/files/88967623758.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/jitufupemevaxekorufurom.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/discord_not_picking_up_mic.pdf
    • https://cdn.shopify.com/s/files/1/0434/0118/3384/files/tamegidowanemubu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3692/6374/files/puzugil.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/lotaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/3808/0166/files/48801084958.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/48069763700.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_off000057fd.bin
4def7f2232b7320a0df3e3c64fc2e50f9ac1c2e5127f44ed498714754bf7bb7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57FD 5676 bytes
font_01_sfnt_off00006b5d.bin
8b43659fe0a77792bada8f99ee142a4c2dab28d5d4c9e98ea44d727b5fe515b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5D 14072 bytes
font_02_sfnt_off0000974c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x974C 4324 bytes

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