Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec3ece414b258ba…

MALICIOUS

PDF

37.9 KB Created: 2020-08-27 19:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 774478470b314ceda710dc842b05189e SHA-1: c4e969771ad889011f8c84425cdd4d9371b43ea9 SHA-256: 9ec3ece414b258ba2034445e12d9cbd99d70ecfc0c4c829a3e82dd467135f8af
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a reference to 'ratios and rates worksheet answer ke', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=ratios+and+rates+worksheet+answer+ke
    • http://womotida.williamayubforsheriff.com/uploads/1/3/0/9/130969656/6047809.pdf
    • http://files.beagle-in-mind.org/uploads/1/3/1/3/131398193/lemuribusafip.pdf
    • https://cdn.shopify.com/s/files/1/0432/1420/9186/files/jifaki.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/87502501355.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/bacillus_thuringiensis_mode_of_action.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/ancylostoma_duodenale_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0435/0692/5720/files/nusupirifasolelubobimosi.pdf
    • https://cdn.shopify.com/s/files/1/0462/4079/2727/files/driver_scanner_canon_lide_300.pdf
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/approaches_to_study_of_political_science.pdf
    • https://cdn.shopify.com/s/files/1/0459/5951/2223/files/koxukigota.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4668/files/affidavit_of_residency_form_atlanta_public_schools.pdf
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/91521775960.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/97832161332.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_off000054aa.bin
7d0ae8d819246ebeac16714bc36cd58a78a683bd77b3d734c91e3c2d2aaa99f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54AA 5044 bytes
font_01_sfnt_off000065d7.bin
d7e069967e8e2dc995937d6ec27cb956fbbebb5aa656c8cf920f8b892b893a6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D7 10960 bytes

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