Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f661590785fdfd…

MALICIOUS

PDF

39.0 KB Created: 2020-08-22 16:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdbcfcfaf4611f5892951c826d8ac5f1 SHA-1: 838a4553428c5d5edf87958d0fe65f7be8df8054 SHA-256: 69f661590785fdfdb15744607c401e64727e6bf9104e4293008f23d97742f3f5
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=akeelah+and+the+bee+soundtrack+free', suggesting a lure for users to click through to potentially malicious content. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the true 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.cc/pify?keyword=akeelah+and+the+bee+soundtrack+free
    • http://files.dwharris.net/uploads/1/3/1/4/131406234/24d02688f2f0dd4.pdf
    • http://sezotag.uhshold.com/uploads/1/3/1/8/131856318/bukazexeg.pdf
    • http://files.chaseandlomarketing.com/uploads/1/3/1/8/131857540/wutufagipumomunip.pdf
    • http://files.g2gdrivingacademy.com/uploads/1/3/1/6/131606408/3527493.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/7300/3939/files/papasujid.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91300886864.pdf
    • https://cdn.shopify.com/s/files/1/0433/0605/7888/files/girekiteselawosolok.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/foxofopa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/88083973104.pdf
    • https://cdn.shopify.com/s/files/1/0431/0941/7127/files/sasawakobojebabitojefowe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2922/files/difference_between_android_one_and_normal_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/45739711825.pdf
    • https://cdn.shopify.com/s/files/1/0434/3758/8646/files/ejercicios_resueltos_sobre_movimiento_ondulatorio.pdf
    • https://cdn.shopify.com/s/files/1/0429/5091/8310/files/messenger_apk_latest_version_2018.pdf
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/9643235942.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26965864763.pdf
    • https://cdn.shopify.com/s/files/1/0445/8296/1311/files/arduino_nano_v3._0_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c72.bin
e390b6308613325d82bc4d5ed6b4bfedd83a3095a85087d46999d4df58ae09cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C72 5136 bytes
font_01_sfnt_off00005dd6.bin
d3dd5ff8d33ed559a34748c9cae09fe106971254455468998963c7e2245ec69a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD6 10272 bytes
font_02_sfnt_off000080e8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80E8 4324 bytes

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