Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ba4c519b77ef02…

MALICIOUS

PDF

41.1 KB Created: 2020-08-24 15:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caebfe0d012181e13cf1a4200eb86d3e SHA-1: 52cdf15c1cb49daf978f3bef5415db5de28f9e53 SHA-256: f2ba4c519b77ef0231befb51ece9cbfb251ccb3059c5cbf29d0858bcfd78c672
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a redirector link to ttraff.com, disguised as a download for a medical dictionary. The heuristic firings indicate that the PDF links to known malicious redirector infrastructure and contains a mass external PDF link farm. The presence of a 'download button' lure further supports the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=oxford+concise+medical+dictionary+pdf+free
    • http://govikesi.cedarwoodtrust.com/uploads/1/3/1/3/131398140/ef215d19.pdf
    • http://xuzifokuk.cghcollectibles.com/uploads/1/3/0/7/130776553/sitofirije.pdf
    • http://files.qnidos.com/uploads/1/3/0/7/130740349/fujagaporebarep.pdf
    • http://files.mpwsr.com/uploads/1/3/1/4/131438676/mufidifivivil.pdf
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/zovero.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/78479203004.pdf
    • https://cdn.shopify.com/s/files/1/0430/6878/4791/files/46417783349.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/wukameferije.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2261/files/fomarew.pdf
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/37394325177.pdf
    • https://cdn.shopify.com/s/files/1/0436/5156/3670/files/typical_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/74113696440.pdf
    • https://cdn.shopify.com/s/files/1/0437/3656/3866/files/one_direction_teenage_dirtbag.pdf
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/physical_chemistry_experiments_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/9517803849.pdf
    • https://cdn.shopify.com/s/files/1/0429/9223/8745/files/loop_a_video.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_off0000623a.bin
254e21a11038921dd1749feaea6d29a748239e237cb50f884be7b397b3604c39
pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 5496 bytes
font_01_sfnt_off000074e0.bin
6cc58ba4a360acfc1c5518e3da069d444ed30491246a9dc4918f0110b173b226
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E0 10136 bytes