Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b07afb1c604595…

MALICIOUS

PDF

44.9 KB Created: 2020-07-31 12:10:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c39e11d5523398952a6d6ddcccfad37 SHA-1: 282a824016402c33472f88664d704a1de781bf8c SHA-256: 68b07afb1c6045951e3ba70fb1545dc6cacf6d098c6511a8a4976d83c5dab133
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, suggests a theme related to 'angles of parallel lines', likely a lure. The presence of a link farm and a malicious redirector indicates an attempt to lead users to harmful content or further stages of an attack.

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.com/pify?keyword=angles+of+parallel+lines+pdf
    • http://files.samanthawyrick.com/uploads/1/3/1/4/131483391/zanevor.pdf
    • http://files.nicheledesignsphotography.com/uploads/1/3/1/4/131408930/wufetotuxawipikefamo.pdf
    • http://files.ninecriticalmonths.com/uploads/1/3/0/7/130775126/b0084f8.pdf
    • http://files.solereaperz.com/uploads/1/3/1/6/131606755/gibulumofatuj-bokojaki-dusevimigekoz-dumesego.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/kewiwonoliwatu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2033/files/78609751866.pdf
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/wotare.pdf
    • https://cdn.shopify.com/s/files/1/0437/3302/4929/files/96232541772.pdf
    • https://cdn.shopify.com/s/files/1/0434/0963/7530/files/67394340578.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/tugodovisovopu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/xekunidudegumarebiw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/1570263904.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zodotuxufaliga.pdf
    • https://cdn.shopify.com/s/files/1/0432/7371/5880/files/85419893279.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/99367361369.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea6.bin
4b24bea08a8713781cc51216339f64a9ba7f4d6613ad2ded1fa01263b8bb0b73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA6 4904 bytes
font_01_sfnt_off00006f5a.bin
de02088230d6c9358504dc67f5856fbab35402223234a5e5eca32536f35b22b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5A 9952 bytes
font_02_sfnt_off00009181.bin
4ce97752c8d1ed0b0302a1507788019c6b738cc3ee96ca273f61f92c287db7cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9181 16072 bytes

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