Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d325409631eba68…

MALICIOUS

PDF

47.6 KB Created: 2020-08-24 04:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a21c088775502026416b2e6f4b292f0e SHA-1: 54a7ca1b6ade38d0cdd5373aa3bf76460adde6a7 SHA-256: 6d325409631eba682aa7cc98a99504b9d1526b2d9279eb04f7bd630b151efe7b
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the payload. The document body and embedded links suggest a lure related to a 'worksafe wa risk assessment form' to entice users to click the malicious link. The presence of numerous other PDF links further indicates a link farm or SEO poisoning attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=worksafe+wa+risk+assessment+form
    • http://files.dustymcmillan.com/uploads/1/3/1/6/131606175/forijawavotodud-vojusinagof.pdf
    • http://lugofawo.koahspeargun.com/uploads/1/3/1/3/131379179/cbb79b7425cb2e.pdf
    • http://sizep.cougarstrongracing.com/uploads/1/3/1/6/131606490/sunokediri_wigisawutal_xakabaxiz_faxipi.pdf
    • http://files.micheleroldanshaw.com/uploads/1/3/0/9/130969061/fd24d76ef79.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/2392/5402/files/metonazafemukamepoposobo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/38805952464.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2612/files/donne_bukowski_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4354/files/lulig.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/18355102616.pdf
    • https://cdn.shopify.com/s/files/1/0434/8438/1337/files/78775333996.pdf
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/jolovopezijenotapoxokal.pdf
    • https://cdn.shopify.com/s/files/1/0430/3545/9738/files/ccs_university_online_exam_form_bba.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7430/files/grep_command_in_linux_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0462/4823/1066/files/3699137924.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/49317098487.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3362/files/besm_d20_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2030/3011/files/mekiwamigozibox.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_off00006f73.bin
aa641f92f6d9c6b7b9484dd395447847bb608ab40a68629a158b7a478ec460a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 4836 bytes
font_01_sfnt_off00007fe4.bin
25a0a4127212669cdad409f8ffff41a100f13c79da7aa58319ce2d1b084b8f33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE4 10300 bytes
font_02_sfnt_off0000a32f.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA32F 4324 bytes

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