Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca3df122ba1611b…

MALICIOUS

PDF

46.0 KB Created: 2020-08-24 14:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff5036948e50fb85e56c79c7aec464d2 SHA-1: 61f9701c172c94e1147007ddba5f411556f51d05 SHA-256: 0ca3df122ba1611b8714c3fa086c63d2c45a399baeaefbeffb6f3f33a0758e3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=formation+chauffeur+de+bus+tec. The document body itself is largely unreadable due to encoding issues, but the presence of numerous links and the critical heuristic firings strongly indicate a link-farming or redirection attack. No scripts were extracted from this sample.

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=formation+chauffeur+de+bus+tec
    • http://files.minutegrillers.com/uploads/1/3/1/6/131606454/8323218.pdf
    • http://files.paradisesharksrealestate.com/uploads/1/3/1/3/131379183/tavumubefirale_gadat_vidigetok_bulimunezoji.pdf
    • http://wokukadaz.michellesmithlaw.com/uploads/1/3/1/4/131408970/kibebosuwabojaf_gipoligamajizim_gorozef_xezovomota.pdf
    • http://files.stonevalleyarts.org/uploads/1/3/2/3/132303229/bedopuveguj_kevekij_sofezu_xoneb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6590/files/20129454445.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/bill_of_rights_philippines_section_1_22.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/xasapobigolunid.pdf
    • https://cdn.shopify.com/s/files/1/0436/7125/7241/files/boat_conformation_axial_equatorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5510/files/sound_booster_app_for_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/zipavubitetowof.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/lozozafugumuku.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_off00006418.bin
c6dc4c3c597d304c45f23b8b11a14779b8977f760b5e340aa9bc1db9c911b9d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 5208 bytes
font_01_sfnt_off00007589.bin
7ac7119e4c2a61cb8c4d6f660c82eaa96f42918bb9decb58712d42edb57fa69a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7589 12124 bytes
font_02_sfnt_off00009b37.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B37 4324 bytes

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