Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c0cc09cc1dbee8d…

MALICIOUS

PDF

45.0 KB Created: 2020-09-18 00:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc536166965efacce24ac7d6f8b96c81 SHA-1: 583af66ff067d6e6c5f23ed8e16f35ded739e528 SHA-256: 3c0cc09cc1dbee8d39021f0c20650da2d5d5fe2be2abe17f7ffbc5d506cf5277
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, however, directs to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for the user to click on the links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=whack+your+ex+on+phone
    • https://cdn.shopify.com/s/files/1/0431/9209/0788/files/anatomie_et_physiologie_de_l_abdomen.pdf
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/c_form_frro_mumbai.pdf
    • https://cdn.shopify.com/s/files/1/0433/5471/8358/files/jejewego.pdf
    • https://cdn.shopify.com/s/files/1/0433/7057/8070/files/ripakixofuwisiwudipalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4343/0305/files/beruxeniwimefuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3743/files/tcfbank_routing_number.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4449/files/xitukumijorewewopan.pdf
    • https://cdn.shopify.com/s/files/1/0434/1356/9690/files/dodiwireni.pdf
    • https://5139eb08-07f7-4255-88e8-b1ecb8e5032e.filesusr.com/ugd/724fb5_93e374eb734b4eb69ae81acab63d0b6b.pdf?index=true
    • https://00029950-a1db-41a1-aa03-fc50b5c483d5.filesusr.com/ugd/e481ce_b055ff95e0c94608b68ad778355b2d02.pdf?index=true
    • https://199df4a1-607d-4037-8e19-7e6d51ba7dcb.filesusr.com/ugd/9cb927_dd1990a68915497f94837a94408581de.pdf?index=true
    • https://e3a845c3-d406-42fd-9147-6fa56ad51016.filesusr.com/ugd/e00bd3_4a10793384e34155be6a17259a655e1b.pdf?index=true
    • https://d613f7d9-62d7-478b-b75f-ef10d74e711a.filesusr.com/ugd/4ae4db_a1cf3166a2a9488d8bda01ccbe134d74.pdf?index=true
    • 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_off000071c2.bin
525c13e5fec1db7f0a76c965f3f8c8bad536241b7fb8094835766a077fab371a
pdf-font-stream PDF embedded font (sfnt) at offset 0x71C2 5060 bytes
font_01_sfnt_off0000830a.bin
626f0e9fb11a2ff1928a61f827a346b0342414be3d2b28889b86eb4a4f03da1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x830A 10904 bytes