Malicious PDF — malware analysis report

Static analysis result for SHA-256 005de2fa4c1be388…

MALICIOUS

PDF

124.6 KB Created: 2020-08-08 19:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acb219b6c1f208479efba65395e1ca97 SHA-1: 25598d93b72c62c913dcff57a6efbeaabdb797c1 SHA-256: 005de2fa4c1be3888e1204c4438c26a55cc9834e6a43533830b5827dfd03bf18
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to obscure the final destination. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=understanding+and+using+english+grammar+3th+edition+answer+key+pdf
    • http://files.cfandtg.com/uploads/1/3/1/3/131379205/zexujogubalu-fozakisusawedef-zibetonafanufi.pdf
    • http://zisuzaf.asfi2020.com/uploads/1/3/0/8/130814238/8e6a181c28.pdf
    • http://files.mylearninginwolfcreek.ca/uploads/1/3/0/7/130775053/tunozogoterokafo.pdf
    • http://files.notenoughwalls.com/uploads/1/3/1/3/131379990/a98fc0055b5673c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/mexutotugo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8348/9690/files/62308385692.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/4115798586.pdf
    • https://cdn.shopify.com/s/files/1/0434/1327/4780/files/ace_personal_trainer_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/3431/8760/files/96279138873.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gatafuruzakelimosileraji.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/midepibaxasotizagobebalam.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/41979390004.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/letoguvemopiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4825/6156/files/wulebotezemojupopo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/git_submodule_add.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3263/files/popawupetofokik.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/59630762135.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/ludaziparonekemif.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_off0001a57b.bin
26da0e4edc51134b96b9fd723b4798268153191068059d6b836434a70e7271ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A57B 5868 bytes
font_01_sfnt_off0001b968.bin
f56e707e811f00d95069bbf339d098cf43da8b88376ceea538fcca07ccb7faa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B968 13412 bytes

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