Malicious PDF — malware analysis report

Static analysis result for SHA-256 610652ef97a52cb3…

MALICIOUS

PDF

56.9 KB Created: 2020-08-24 09:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49432ca747d7a988f706876546b6a203 SHA-1: 4f02356210ba838dc12622c697611ade11e50318 SHA-256: 610652ef97a52cb33ac42b855ad1b300790c4a4a26a72953b6cd6559bbb9fb66
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. The presence of a large number of external links, many pointing to Shopify domains, suggests a link farm or a method to obscure the ultimate destination. The ML classifier also strongly indicated maliciousness.

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=you+will+be+found+sheet+music
    • http://files.colhenryart.net/uploads/1/3/2/7/132740633/c5664.pdf
    • http://files.trucksntools.com/uploads/1/3/1/4/131453276/mapisilojifep.pdf
    • http://files.kscenvironmentalstudies.org/uploads/1/3/1/6/131637606/bolipopudegin.pdf
    • http://files.lashthetics.shop/uploads/1/3/2/6/132695601/1356740.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/biological_anthropology_concepts_and_connections_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9525543421.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/fujanuvezofotakajafager.pdf
    • https://cdn.shopify.com/s/files/1/0437/0805/5720/files/apraxia_da_fala.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/16765622474.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/fikomixiluzotasilugekiwob.pdf
    • https://cdn.shopify.com/s/files/1/0429/6340/2905/files/33629063880.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/47163539776.pdf
    • https://cdn.shopify.com/s/files/1/0429/6133/8531/files/basic_accounting_cycle.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e1e.bin
b26264315096d167d32b6969d30857789cd02d6a0d81b2a22e1308e84b12ef50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1E 5032 bytes
font_01_sfnt_off00008f20.bin
58d5d6b21ba689a8ff7ed37427656969c3d2fcc45816a0e6e9e114f33f6b960e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F20 10492 bytes
font_02_sfnt_off0000b344.bin
d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB344 16100 bytes
font_03_sfnt_off0000c812.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC812 4324 bytes

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