Malicious PDF — malware analysis report

Static analysis result for SHA-256 924a12f78b65d2dc…

MALICIOUS

PDF

44.2 KB Created: 2020-08-14 14:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a23907014c136f7bac5d120db10059a0 SHA-1: b617ffd9aa9ddd1cbd291e87cc2301a38da7e7ad SHA-256: 924a12f78b65d2dcf159f3e42248467f9ec625719f2ef0a06aa6d9fff0c4994f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.cc'. The document body, though partially corrupted, includes text related to 'Credit Suisse investor relations annual report', suggesting a lure to trick users into clicking the malicious link. The presence of a PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing strongly supports this attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=credit+suisse+investor+relations+annual+report
    • http://rudoze.razorsharp.com.sg/uploads/1/3/0/7/130739873/lebiluzi_duloredarifuze_fofam.pdf
    • http://files.sharryborgan.com/uploads/1/3/1/8/131871692/sofolizujoboti.pdf
    • http://vezago.banerjeesharmistha.com/uploads/1/3/2/6/132682883/rokatekanis-dananata-kugikebep.pdf
    • http://lexujav.3sistersgrace.com/uploads/1/3/0/7/130776680/7291195.pdf
    • http://saxodatod.helsbellshandmade.com/uploads/1/3/1/0/131070847/1918394.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/megugutinede.pdf
    • https://cdn.shopify.com/s/files/1/0437/4301/9157/files/angielski_gramatyka_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/wolff_in_defense_of_anarchism.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1125/files/lepalewatixajujivogusan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/travel_itinerary_template_apple.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/bakejitarojinozubuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/kilamekulipilakudisev.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/jidujuxezijozapigaguse.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/6760925901.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/4632059318.pdf
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/juraf.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1733/files/18241221828.pdf
    • https://cdn.shopify.com/s/files/1/0448/3517/6608/files/to_be_past_simple_test.pdf
    • https://cdn.shopify.com/s/files/1/0437/0527/0437/files/mesolefo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006206.bin
7b36cc2bf696881e44e90ee13e7520d6eaec1e858340ef092faf13ee6b4c115c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6206 4920 bytes
font_01_sfnt_off000072cd.bin
25d4a5143c5a126c2260bcd1ea820a2cbb4d24e2614ac120d457e2bd26a29979		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CD 10088 bytes
font_02_sfnt_off0000953b.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x953B 4324 bytes

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