Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e053fe0a097da3…

MALICIOUS

PDF

51.4 KB Created: 2020-08-06 12:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 001add068eff11b8203d14a7c95f14cd SHA-1: 4f922889fa2bbb3731ce0f7ab60196a499d1e413 SHA-256: 08e053fe0a097da3515c67285a29eae89677dcd38b127a07566d4d32e357d4a3
154 Risk Score

Malware Insights

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

This PDF document contains a high number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=bim+arabia+pdf, which is likely intended to lead the user to malicious content. The ML classifier also strongly indicated maliciousness.

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=bim+arabia+pdf
    • http://files.greendragonkungfu.ca/uploads/1/3/1/4/131409037/femes-bemoxabu-kukin-kalupeketodud.pdf
    • http://files.ecclesallwealth.com/uploads/1/3/1/4/131452838/jamikom.pdf
    • http://files.marzbanhealthandrehab.com/uploads/1/3/0/7/130775286/wibibuw.pdf
    • http://mebovoz.mcmasterclimbingclub.com/uploads/1/3/0/8/130874359/tapur.pdf
    • http://files.paulsmacs.com/uploads/1/3/1/3/131381799/rixiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0310/1863/files/vapubomusigijawazuta.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/lizizusikewesi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/kptcl_assistant_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0437/1188/9576/files/30847657398.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/kiseme.pdf
    • https://cdn.shopify.com/s/files/1/0428/4838/7239/files/dekotebela.pdf
    • https://cdn.shopify.com/s/files/1/0439/2720/8091/files/51836014031.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/12576758308.pdf
    • https://cdn.shopify.com/s/files/1/0446/7025/5267/files/yuen_method.pdf
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/simple_past_past_participle_list.pdf
    • https://cdn.shopify.com/s/files/1/0440/2629/8533/files/work_sampling_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/13437751981.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009d53.bin
dc2fe5f4455543204cab9e74179066ec84d5d17f946d78d7f4a49a2de5084b7c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9D53 20764 bytes
font_00_sfnt_off00005ea1.bin
12e27c9d1b956d781cfad99ff322e745c61efb3bd96b60c0dd0f523fd3441fc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA1 5164 bytes
font_01_sfnt_off00007013.bin
451295930b623afcb2fa29e2ff4fa394caad8e0369b37ed64473c40c3c14bcb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7013 14544 bytes

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