Malicious PDF — malware analysis report

Static analysis result for SHA-256 d93f07b66edf1c7f…

MALICIOUS

PDF

46.3 KB Created: 2020-07-30 12:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34cd418421e416d244b02155a1208983 SHA-1: 6f7f6cb6a69e5ab95d6b181edef34068675e11cb SHA-256: d93f07b66edf1c7f421a87a9d27bcef877c8c799eb63718d4bddce7ba08ab53b
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'gsm antenna types'. The presence of a mass external PDF link farm further supports the malicious intent of redirecting users to potentially harmful 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.com/pify?keyword=gsm+antenna+types.+pdf
    • http://files.mimisclothier.com/uploads/1/3/1/4/131410747/wazilesuri.pdf
    • http://files.businesswritingmasters.com/uploads/1/3/2/8/132814071/saxili_pazelobesaguki_jifex_masoxumopo.pdf
    • http://files.elbowlakebc.com/uploads/1/3/1/3/131398360/rodimasinet-pedetut-luwopeseke.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/paluligebirasafuvakirito.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/11085069317.pdf
    • https://cdn.shopify.com/s/files/1/0437/6644/8277/files/12169606112.pdf
    • https://cdn.shopify.com/s/files/1/0430/0881/9349/files/zidazu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/viredog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/57799014531.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/87403362841.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0432/6211/6008/files/17930802540.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96989945255.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/43273306887.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/divulerarimosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/bajopivosop.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0165/files/11882808511.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/
    • https://cdn.shopify.com/s/files/1/0433/7005/378

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077cf.bin
85a5256daa7fc41d3d4c439c91d36ee653711c0fc5e53c826c564bedffcb5b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CF 4856 bytes
font_01_sfnt_off00008848.bin
34fc7d5152a7f0dfa406e5ab06ea68889aa61aa14775da8d60f302477b82beca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8848 10840 bytes

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