Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b468ce6c0e7ebed…

MALICIOUS

PDF

46.3 KB Created: 2020-08-06 04:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51de3519e3b3fa2150c3d4da082ab191 SHA-1: b25ebb6b8df28f647cf7954b386edd8d2a68900c SHA-256: 3b468ce6c0e7ebeda50e7397e35176f47ad034227d5f6ac842125f6de742835b
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, disguised as a PDF document about interview questions, redirects to a known malicious redirector. This suggests a social engineering attack aimed at driving traffic to malicious sites, likely for further exploitation or malware delivery.

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=conversation+interview+questions+and+answers+pdf
    • http://files.ejchscounseling.com/uploads/1/3/1/4/131408245/8800109.pdf
    • http://pipejulot.marinapo.com/uploads/1/3/1/0/131070356/nakixa.pdf
    • http://files.minneysyachtsurplus.com/uploads/1/3/0/8/130813782/9cbec.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/wivebobipofid.pdf
    • https://cdn.shopify.com/s/files/1/0433/4577/2698/files/markel_technical_communication_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/6262/3397/files/october_2020_calendar_lala_ramswaroop.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/mosepo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1278/files/39910032048.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/9938124850.pdf
    • https://cdn.shopify.com/s/files/1/0432/7240/5157/files/gelonetapawowegareladixo.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/caballo_de_troya_7_nahum_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/61519400195.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/76906637386.pdf
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/deconstruction_theory_and_practice_christopher_norris.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5688/files/82981199788.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/45801163521.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_off00007764.bin
68744a50fcfe177ca6c7f0424ded9e1c8951a089a63a2fd01287472fdaff9b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7764 5188 bytes
font_01_sfnt_off00008927.bin
d80f43a0b148edafc6c87daba53608df74b5698d8cd9d57dd206b2c292fac262		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8927 10340 bytes

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