Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5886525c6370f02…

MALICIOUS

PDF

65.3 KB Created: 2020-08-27 19:29:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb2d652b8b13ffe53fa58d9a64ec2c5f SHA-1: ce2715014dec113a4a5eea0fa09b5f26b915d484 SHA-256: d5886525c6370f029f59b163b6583c4674e4c1a24817853574e41ed5fd745416
152 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 pointing to shopify.com, but one critical link directs to a known malicious redirector at ttraff.com. This indicates a deliberate attempt to lure users to malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, so the attack pattern is inferred from the link farm and redirector.

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.com/pify?keyword=the+terror+season+2+episode+1
    • http://files.ruefrancaise.com/uploads/1/3/0/7/130738696/reweme-mafujakekor-pafobatitisag-zokufar.pdf
    • http://files.movequickly.eu/uploads/1/3/1/4/131452935/puvugutuxewam.pdf
    • http://files.foundationofhope.us/uploads/1/3/1/4/131437862/sutekufo-lisuvizobuxe.pdf
    • http://files.highheartcrystalhealing.com/uploads/1/3/2/8/132816096/tedolem.pdf
    • http://files.whitehouse.edu.pk/uploads/1/3/2/6/132696117/9131993.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/211437004.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/42671060972.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3925/files/44949189768.pdf
    • https://cdn.shopify.com/s/files/1/0433/4967/2091/files/causes_of_poverty_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/35404690556.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/pia_split_tunneling.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2119/files/kozulalufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/christmas_tree_drawing_pic.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/nukijijovipuzujuwesevop.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/36246068361.pdf
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/zebodikobewejanurenavakem.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_off0000c3e6.bin
c3f107aa97981a2a00782674a59ec44367398030417938c1422ee530219bc185
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E6 5148 bytes
font_01_sfnt_off0000d568.bin
c1df3a6d4b0087a8cfcf08333493a29d52c008688c606f5f1cb0133e69a38aaa
pdf-font-stream PDF embedded font (sfnt) at offset 0xD568 10324 bytes