Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae86edf9db0c2f5b…

MALICIOUS

PDF

63.5 KB Created: 2020-08-03 11:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a6df7010d833f0c6cdfb6c89cf5d627 SHA-1: 69c8714fe04254503f04b5c5d98f51e308625e53 SHA-256: ae86edf9db0c2f5bd518667064b430d9ca7d27500931a10e7f432fe4b4113151
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to a teaching position application. It embeds a link that is flagged as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the embedded URL leads to known malicious infrastructure, and PDF_SEO_LINK_FARM indicates a large number of outbound links, typical of SEO poisoning or link farm abuse. The primary malicious IOC is the redirector URL.

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=sample+application+letter+for+teaching+position+in+college+pdf
    • http://files.dynastynparadise.com/uploads/1/3/2/7/132710665/5404740.pdf
    • http://files.completeboxing.com/uploads/1/3/0/9/130969710/6186999.pdf
    • http://files.knightwoodtuition.com/uploads/1/3/1/6/131637631/7022d670932.pdf
    • http://files.grettawilson.com/uploads/1/3/1/4/131437351/5306487.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/rabenupaxokagavidi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/15795391127.pdf
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/64326253488.pdf
    • https://cdn.shopify.com/s/files/1/0433/1657/6424/files/81431366568.pdf
    • https://cdn.shopify.com/s/files/1/0438/2552/8989/files/mepalevesebijozobive.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/niwokobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/stormfall_rise_of_balur_cheat.pdf
    • https://cdn.shopify.com/s/files/1/0435/7649/2195/files/keith_urban_kiss_a_girl.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2655/files/73973254147.pdf
    • https://cdn.shopify.com/s/files/1/0430/1727/3497/files/69121410250.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9553/files/ugly_s_electrical_reference_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/68440234156.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/98069736709.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/
    • https://cdn.shopify.com/s/files/1/0435/7649/2195/files/keith_urban_kiss_a_g

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab78.bin
82ac3083d0edd951137b64d4e77fb8ab16a3dd5ca351963903a903458b37bfc8
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB78 5460 bytes
font_01_sfnt_off0000bdce.bin
4b1607c8eb74cc8e1c3c94214dcbb813250b1d1927e136d3f7b4fad633c8b0a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCE 10548 bytes
font_02_sfnt_off0000e1cd.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CD 4324 bytes