Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d60788dcc557edc…

MALICIOUS

PDF

48.9 KB Created: 2020-07-12 21:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce0ea5c2b8e47c044957177345f5f1da SHA-1: 244ffdd426a41f0b4ff6a7aa16ac558b8ab83a52 SHA-256: 0d60788dcc557edc69de0a6734de2e3cc3b086fe82f60c102a34dd2fdb4947f3
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded links suggests an attempt to lure the user to external, potentially malicious, websites for further exploitation or information gathering.

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/wb?keyword=uv%20calibration%20procedure%20pdf
    • http://files.firststopwindows.com/uploads/1/3/0/8/130813921/9003502.pdf
    • http://files.skategravitate.com/uploads/1/3/0/9/130969673/lumaromedonewo_miburuxuk_suvejitepa_xepuviruto.pdf
    • http://files.uwacumedia.com/uploads/1/3/1/0/131070572/sodatixotugarelilol.pdf
    • http://files.brendargarcia.com/uploads/1/3/1/1/131164351/sodoxo-kifaleb-vakebikote.pdf
    • http://files.firstlutheranricelake.com/uploads/1/3/1/1/131164456/susod.pdf
    • http://files.4-ucorp.com/uploads/1/3/0/7/130739567/7385382.pdf
    • http://files.waytobe.net/uploads/1/3/0/7/130738628/zazokavum.pdf
    • http://files.encorect.org/uploads/1/3/0/9/130968961/podoxelosa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bidazinefak.files.wordpress.com/2020/06/76603841750.pdf
    • https://robepeler.files.wordpress.com/2020/06/3867605176.pdf
    • https://zoroxozuwo.files.wordpress.com/2020/06/70570963328.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/davozefuxujalovoxokerefo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/lawufivonigogupasuwe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/luvikumefoporedufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/20461482694.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/79667972290.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_off0000798f.bin
1716137c19e457b05a188a7e1c3dae2a293fd38895645b3284ed59962a14fb7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x798F 5044 bytes
font_01_sfnt_off00008ab9.bin
3cbb5265fc827976f10fec7ebb8b9e7bc9f62ce20a7265d709b11afb3623eb92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB9 13716 bytes

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