Malicious PDF — malware analysis report

Static analysis result for SHA-256 4408fe52bd8b3cbf…

MALICIOUS

PDF

43.3 KB Created: 2020-08-25 03:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2e7aee3acd727966d67be278cd1e9f7 SHA-1: cf29b89763ec999ace0fb777c0a06143f8b5387e SHA-256: 4408fe52bd8b3cbf7dacd14d6e3dbf43c88f38d3f255aaf8bce4b2b34368722e
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though partially corrupted, contains text related to 'Windows 7 enterprise activation key generator', indicating a social engineering lure. The primary malicious URL is https://ttraff.ru/pify?keyword=windows+7+enterprise+activation+key+generator, which is likely used to redirect the user to a further malicious destination.

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=windows+7+enterprise+activation+key+generator
    • http://files.matthewdavissports.com/uploads/1/3/0/9/130969352/jutun-lukivipos.pdf
    • http://files.tamimurphy.com/uploads/1/3/0/8/130814208/4177767.pdf
    • http://files.sunshineshopgiftbaskets.com/uploads/1/3/0/9/130969322/tofiwupotalabomuz.pdf
    • http://kakuguwoz.thomasnazario.com/uploads/1/3/0/7/130775166/dexokokemud.pdf
    • http://files.catherinedanielfitness.com/uploads/1/3/2/6/132681891/5f9bc636051c.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/aradhana_mp4_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0434/1619/1138/files/gimiguranedujinabujogepul.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/fezefafurulukasidosu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5454/6590/files/74187527343.pdf
    • https://cdn.shopify.com/s/files/1/0430/1901/0201/files/47533136834.pdf
    • https://cdn.shopify.com/s/files/1/0440/2734/7109/files/82871004551.pdf
    • https://cdn.shopify.com/s/files/1/0437/0949/7496/files/1782169103.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/48919728772.pdf
    • https://cdn.shopify.com/s/files/1/0428/9167/3763/files/vaxapogiripax.pdf
    • https://cdn.shopify.com/s/files/1/0434/7068/4317/files/cricket_world_cup_final_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/5526/6457/files/agribusiness_risk_management.pdf
    • https://cdn.shopify.com/s/files/1/0459/1350/5941/files/mustang_performance_parts_houston.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/30776144640.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_off00006870.bin
a9ca8634fc70be4e317f57b0b3026377c7a4d27cdb432f6b70644cd10433abdd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6870 5620 bytes
font_01_sfnt_off00007bc8.bin
9292a79f8d568b35febdab4f0bd15aebd5b6d02191919e2c3f43c28b37a985ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC8 10640 bytes

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