Malicious PDF — malware analysis report

Static analysis result for SHA-256 235a1b997fd01029…

MALICIOUS

PDF

47.9 KB Created: 2020-09-18 16:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 490ca0c961a9d0b14abd3cf22be53bf6 SHA-1: 234ab84238ab5aa78d26500d7e67b533bb00f36d SHA-256: 235a1b997fd01029d40f4852663369ad0ad3dda9040afd324ecc18d77a2648bf
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed to improve search engine rankings for malicious content. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to academic topics and URLs, suggesting a lure to trick users into clicking malicious links disguised as educational resources.

Heuristics 3

  • 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.
  • 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.me/wix?keyword=ap+biology+lab+1+diffusion+and+osmosis+answers
    • http://files.pictonlittletheatre.com/uploads/1/3/1/4/131436981/rafimixexegitit.pdf
    • http://dejikafum.tygoyachts.nl/uploads/1/3/1/3/131380600/ecdd15b83979292.pdf
    • http://vipagire.fourcornersboardofrealtors.net/uploads/1/3/1/6/131636813/f905a10f124f.pdf
    • http://ferokatiw.maizalrestaurant.com/uploads/1/3/2/7/132710714/biwojonagadoze-rarelazufil-fobemuluzuzata.pdf
    • http://files.alabamacentralrailway.com/uploads/1/3/0/9/130969265/7679675.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2616/files/nfl_coaches_hot_seat_bleacher_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/argument_essay_example.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/16509098552.pdf
    • https://cdn.shopify.com/s/files/1/0434/0740/9310/files/79108124790.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/fekelil.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/belivigumanavogajewive.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/homemade_dovetail_jig_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/jewapi.pdf
    • https://cdn.shopify.com/s/files/1/0462/3790/9141/files/beatles_love_album.pdf
    • https://dcf06979-ce69-437d-af60-7f42e18f65f3.filesusr.com/ugd/b6aaa0_6ac8078d20f44ba0948b0e7b9ea3ab6d.pdf?index=true
    • https://f026e5c2-a75a-48ea-be42-dcc32083201b.filesusr.com/ugd/01f9b9_1689b3c1d60c4a4293d9095d242213f4.pdf?index=true
    • https://54c25809-dc51-47b6-abcc-73e773f8efe0.filesusr.com/ugd/72b0e7_151733c6a2e6481b9a84f524ea5b9a85.pdf?index=true
    • https://396469f1-b1f3-47e8-ac3f-aead07d06522.filesusr.com/ugd/02beb7_8b843a564ebc4231b12584433a6970bf.pdf?index=true
    • https://9e212605-6d6e-4b21-b6f8-c3fcc768e954.filesusr.com/ugd/3eed2b_b5b6ab67704a407596d8e3c78fc237cc.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079cd.bin
bfe56ac6ccd9d8898a391328606839909cb11284eb7e5e96e995ea499061242c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79CD 5736 bytes
font_01_sfnt_off00008d58.bin
d1f2efdb29d40737f15c62ab4a1fa4ca9c5622218163c101d86b2ff2535930a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D58 10796 bytes

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