Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb9d3119bd23fc0…

MALICIOUS

PDF

48.8 KB Created: 2020-08-07 02:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e194ae37a10dac108cda7c9d9780e7c1 SHA-1: fead38e7498cda06ef770b7469a06c09c6467ffe SHA-256: deb9d3119bd23fc0324b87f9e94c1b0aa36088ed887923c20fd44eb356098882
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a prominent link that redirects to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains the text 'Atomic theory pdf notes' and the malicious URL, suggesting a lure. The 'PDF_SEO_LINK_FARM' heuristic indicates the PDF is part of a larger scheme to generate traffic through numerous links, likely for SEO manipulation or to distribute malware. The ML classifier strongly supports the malicious nature of this PDF.

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=atomic+theory+pdf+notes
    • http://files.littlestarsfamilychildcare.com/uploads/1/3/2/7/132740871/levudewunexiwexune.pdf
    • http://files.whiterivermwd.com/uploads/1/3/2/7/132740637/7157581.pdf
    • http://files.adelaidechickensittingservice.com/uploads/1/3/2/8/132814476/kazawuparudelujevet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/galuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1268/files/5875192523.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/96119953255.pdf
    • https://cdn.shopify.com/s/files/1/0428/3164/2780/files/42305737729.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0263/files/tepikuxuzizov.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/jivukisovixuxefitapoki.pdf
    • https://cdn.shopify.com/s/files/1/0436/9544/0040/files/jonapa.pdf
    • https://cdn.shopify.com/s/files/1/0438/3450/7426/files/49514825796.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/thinking_fast_and_slow_reddit.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/14945048258.pdf
    • https://cdn.shopify.com/s/files/1/0439/4388/7016/files/ferugu.pdf
    • https://cdn.shopify.com/s/files/1/0440/9799/4904/files/printable_affirmation_cards.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008159.bin
0ff6ca3f2ea2bcec5d05fb98ae850df2bae77a3e0e330e85202c06d2171e125b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8159 5244 bytes
font_01_sfnt_off00009315.bin
a72a6843a059ad93bb2b66e931897d0ce4a483bc314d9429ef2272a0d6f7a0da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9315 10244 bytes

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