Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09a2caeefa9d7ca…

MALICIOUS

PDF

48.0 KB Created: 2020-09-18 03:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7e1100ce1c12f42be8a7cf6e44c85c9 SHA-1: cdf4a740a1ca93ba6657b94fbed53038a8b0367e SHA-256: d09a2caeefa9d7ca0e89a4f6ababa49163fb4bc159ddc58dafffa668ff05176f
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding numerous external links. A critical heuristic identified a link to a known malicious redirector, https://ttraff.me/wix?keyword=regan+and+goneril+analysis, suggesting this PDF is part of a campaign to direct users to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body is largely unreadable binary data, but the presence of the malicious redirector and the link farm structure are sufficient indicators of malicious intent.

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.me/wix?keyword=regan+and+goneril+analysis
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/3423639658.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/sikudelonevogipasosiriv.pdf
    • https://cdn.shopify.com/s/files/1/0430/3077/3913/files/chennai_express_full_movie_filmyzilla.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6472/files/59767063116.pdf
    • https://cdn.shopify.com/s/files/1/0440/6244/1637/files/61737695683.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.pdf
    • https://cdn.shopify.com/s/files/1/0457/3108/6502/files/28036703246.pdf
    • https://1584b169-675d-4060-98e8-c5682131937d.filesusr.com/ugd/ebcc4b_eab5208686154e0c889f6dd31ba8dac1.pdf?index=true
    • https://59ea84fa-745b-4c15-ab00-c9a72a3cc511.filesusr.com/ugd/140efa_ec222e26347645a098237e12a954e6cd.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/0839/2353/files/bodyweight_workouts.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/adhocracy_form_of_structure_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/2947/9076/files/feature_graphic_google_play_template.pdf
    • https://cdn.shopify.com/s/files/1/0443/1613/1484/files/gejewakij.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_off00007e8b.bin
ca1ba272712dad472b4922299c6cae340925ab43ce762aa3120fd97c137cb50b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8B 5100 bytes
font_01_sfnt_off00009003.bin
7f5b2509a1ff538c36bbc1e5d2b18bdcb0507065626c27d4268ad79a3b683335
pdf-font-stream PDF embedded font (sfnt) at offset 0x9003 10352 bytes