Malicious PDF — malware analysis report

Static analysis result for SHA-256 53465cfc66a4204c…

MALICIOUS

PDF

41.0 KB Created: 2020-08-21 00:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c7ac5975a25e1db058ae7ab4f3e5869 SHA-1: a81b2c6ad40cb29be0ef5393de7fbf61f800fa5f SHA-256: 53465cfc66a4204c7227978373a2f11cbfebb0ab886ccae56b49c4144ad15ead
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a keyword suggesting a lure for "cast screen software for pc". The presence of a PDF link farm heuristic further indicates a malicious intent to distribute links. The primary IOC is the malicious redirector URL, which is likely used to funnel victims to further stages of an attack.

Heuristics 3

  • 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.
  • 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=cast+screen+software+for+pc
    • http://kamup.pibpoa.com/uploads/1/3/1/6/131606289/pugaliten_derifox.pdf
    • http://files.hopeinhollywood.org/uploads/1/3/2/7/132740618/taderasaba_xirum_gujoradalekepo_laruligatuvigi.pdf
    • https://cdn.shopify.com/s/files/1/0454/7251/4206/files/noranatasodidikozemasid.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/zakaton.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/somidez.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5982/files/fishing_barents_sea_crab_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/8889/6415/files/ahs_season_6_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/1174/2628/files/first_marriage_certificate_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/hypertension_guidelines_2020_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/sibafidi.pdf
    • https://cdn.shopify.com/s/files/1/0441/2126/0184/files/buxenuwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/ramogonuretoluwuzuxetude.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_off0000635b.bin
8c465c3909454ce1386bca2fde6f02532863011dedb71b9b15fa91e775f748d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635B 4976 bytes
font_01_sfnt_off00007462.bin
c845e9912800432e9e77a7b007c52c73d2793647ca5e92b46c9b95c3d7f37b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7462 10352 bytes

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