Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1c2d19da000810…

MALICIOUS

PDF

47.8 KB Created: 2020-08-20 20:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5db53048bafae8bdeac94b90a5861203 SHA-1: 216dbb1405443eaeb99b49176434756cbd16e741 SHA-256: 1d1c2d19da00081006f880bb989f8942bbb26eb9f36e6e7a176681eedfc4716f
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of numerous embedded links, a common tactic for phishing or malware distribution. One critical heuristic firing points to a link leading to a known malicious redirector (ttraff.ru). The document body, though heavily obfuscated, contains the same redirector URL. The file also contains a large number of other PDF links, many hosted on Shopify, which is indicative of a link farm designed to manipulate search engine results or distribute 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=closers+survival+guide+pdf
    • http://nuvojiko.friendsofalcott.com/uploads/1/3/2/6/132682646/kawiladu_jatoxit_zijig.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/basic_automobile_engineering_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/1859/8038/files/chloroform_uses_today.pdf
    • https://cdn.shopify.com/s/files/1/0437/6012/4061/files/61081846870.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/mazimexusebatede.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/altivar_312_manual_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/alkylation_and_acylation.pdf
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/when_to_use_binomial_cdf_vs.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/53553333486.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/85009466978.pdf
    • https://cdn.shopify.com/s/files/1/0437/2011/4331/files/bujedaxarujiberitexafewu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/xoxusatadonufefaxeramosiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8132/5987/files/39580370937.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_off00007daf.bin
0dc7373731d51707adde77dce5eeb4d134a87daa3aa5549646e6ab2428d363cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAF 5176 bytes
font_01_sfnt_off00008f60.bin
f6a1cbbb714bc6b8c1d97d40f645afd92290ed158cbb7a14e3274a00551c71da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F60 10300 bytes

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