Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f29580b2dc520e…

MALICIOUS

PDF

62.4 KB Created: 2020-08-05 06:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef0499e83bb0169b25d2a4b817bf4ede SHA-1: f4f96a0b31300eaadf70b2b8bf0bca242f2f3799 SHA-256: 44f29580b2dc520e2085c5ec16d17377a276de87dd39facbf6bb3f223e9fdea9
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector. The presence of a large number of external links suggests an attempt to manipulate search engine results or to lure users 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.ru/pify?keyword=metode+argentometri+pdf
    • http://woruxa.craftedcasesnc.com/uploads/1/3/1/6/131606552/jovukunivijina.pdf
    • http://files.pinegrovecogop.org/uploads/1/3/0/8/130874318/de351d21ce3806f.pdf
    • http://files.urbanmarketturlock.com/uploads/1/3/2/3/132302855/gikapis_zovinomu_migog.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/12246246314.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/mumuzefojoxapedetegewiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/7981/8661/files/25670401664.pdf
    • https://cdn.shopify.com/s/files/1/0436/4291/2926/files/dulujumomitabekobotera.pdf
    • https://cdn.shopify.com/s/files/1/0438/8972/1496/files/algebraic_equations_with_fractions.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/2439005702.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/rerejasasipidawe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4632/9750/files/12513851824.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/46448273134.pdf
    • https://cdn.shopify.com/s/files/1/0431/0482/9589/files/ruxuvaxeturavelirufoduvu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2690/files/92135688435.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f61.bin
c80b935bb2e72fbf0bb54bead4dcf673e2ee9ff5a06d35ab91e29c0786333a85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F61 1696 bytes
font_01_sfnt_off0000878b.bin
5e1377e910e3a36f221f7006ae159ed90800a7266a08daba0fde2c649a034473		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878B 4944 bytes
font_02_sfnt_off0000984e.bin
43453c8205e8a99a330cdf2df5cccb0c8931cd1cae244a6f3a3338ba5663b8a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x984E 15572 bytes
font_03_sfnt_off0000c7ca.bin
12d32f0250e5cac7594322dbffa9209e804503813b1d9a7d379b29fb45aec5a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CA 16260 bytes
font_04_sfnt_off0000dd58.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD58 4324 bytes

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