Malicious PDF — malware analysis report

Static analysis result for SHA-256 de5e7c9d60095484…

MALICIOUS

PDF

49.7 KB Created: 2020-08-07 04:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32e0f36f438ef37cf5e9a21cbdbb41bf SHA-1: 3ef4e919456507c2b401436917d9bc2bdcc75870 SHA-256: de5e7c9d60095484227637ca7bec5a01ce917ab9d425f6c1276da0dfd54b687f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially garbled, includes text related to 'computer courses' and a URL that appears to be part of a link farm designed to attract traffic. The ML classifier strongly indicated maliciousness, and the PDF structure suggests an attempt to disguise malicious links within seemingly legitimate content.

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.ru/pify?keyword=all+computer+courses+pdf
    • http://files.westwoodpubliclibrary.org/uploads/1/3/2/6/132696063/98aa37a563521.pdf
    • http://files.iamfreetour.com/uploads/1/3/1/6/131606674/9139556.pdf
    • http://files.warriorsofpurpose.org/uploads/1/3/2/8/132814898/9919010.pdf
    • http://files.trailsendartworks.com/uploads/1/3/1/4/131406114/saradaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/xutivokijuwekiwemibajuke.pdf
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/candidate_relationship_management.pdf
    • https://cdn.shopify.com/s/files/1/0431/1003/9719/files/5937565709.pdf
    • https://cdn.shopify.com/s/files/1/0438/4571/4077/files/ziwupaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/64158246198.pdf
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/approval_process_handbook_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/runigaresuteludaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/56528122447.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/free_mp4_editor.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066cd.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CD 6744 bytes
font_01_sfnt_off000077b2.bin
b5a24666063484249789f5037ed22a5eac4df04bbc9d69b88125664c6e40f41a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B2 4808 bytes
font_02_sfnt_off00008811.bin
fe24dd8f29a9f64137443d928f441883076ad9a8a0de58e06b5f81199c491952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8811 10360 bytes
font_03_sfnt_off0000ab89.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB89 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.