Malicious PDF — malware analysis report

Static analysis result for SHA-256 f33d5f33844a5163…

MALICIOUS

PDF

41.2 KB Created: 2020-08-09 05:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be76259b7232e2530a7704b2f2ed7580 SHA-1: eced0a55f9c9268c5f4c05761398b684c01cc32a SHA-256: f33d5f33844a5163c80361a1951e3bc977cefb93d0017681432eb5ce4920b32b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious link identified is https://ttraff.ru/pify?keyword=borderline+personality+disorder+demystified+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious content under the guise of providing a PDF document.

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.ru/pify?keyword=borderline+personality+disorder+demystified+pdf
    • http://files.jmsupplyga.com/uploads/1/3/1/6/131637853/3808439.pdf
    • http://files.smspeedway.net/uploads/1/3/0/7/130775950/3621088.pdf
    • http://suziralov.thairicespoon.com/uploads/1/3/1/6/131606490/zalexivet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/napujeguwuka.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52135332303.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/ponaralavokizibejaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/16473221368.pdf
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/luzalu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6119/files/seller_support_associate_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/fitefikozutizenegono.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9125/files/gepituda.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0205/files/bobuwulelixel.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/40236598938.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/jofin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/catalogue_marjane_fevrier_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/15640196831.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_off0000630f.bin
5753e67a3a30db8eb94e049e3fb5f0edf564951135f34320f32635319392ff97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630F 5336 bytes
font_01_sfnt_off0000752b.bin
5e185e5a09c356225b6219006412383c8bc8c7e318ba7cf0fe8c327eca5a6040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752B 10088 bytes

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