Malicious PDF — malware analysis report

Static analysis result for SHA-256 c460cfcb2db31525…

MALICIOUS

PDF

46.7 KB Created: 2020-08-23 13:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26a85cdc6ea42aec97526d62d53f80f5 SHA-1: 0a0f8fe6b23798e0ab22d3f9160e8f15b244459f SHA-256: c460cfcb2db31525e57d8aa6c5d5674fb521fd733966122cc604db8f7083d2c5
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a document related to 'adoracion nocturna mexicana'. The ML classifier strongly indicated maliciousness, and the PDF was found to contain a large number of external links, many pointing to Shopify domains, likely for SEO poisoning or to obscure the final malicious destination. The primary malicious IOC is the ttraff.com redirector URL.

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=adoracion+nocturna+mexicana+pdf
    • http://files.mediasourceamerica.com/uploads/1/3/0/8/130814605/8329962.pdf
    • http://bosalon.jayafrica.com/uploads/1/3/1/8/131857101/renesagez_nidosovane_popijoxevin.pdf
    • http://files.christianphoto.biz/uploads/1/3/2/6/132696214/zovegusavafuteseda.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/14050701786.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/letters_of_pontius_pilate.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/local_and_general_anaesthesia.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/partnership_by_estoppel.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/ludigofikupajisanolebuwid.pdf
    • https://cdn.shopify.com/s/files/1/0428/4514/3207/files/semizixuku.pdf
    • https://cdn.shopify.com/s/files/1/0436/0280/4898/files/current_affairs_cloud_june_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevimija.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/mijotobabominozomulagiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8549/files/mipuporonusetixa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/82969020106.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/13058969343.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_off000074fd.bin
1f98f618651f52fd5ec38da27116d5c282efd4133a4ddb2849c479084342832d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FD 5148 bytes
font_01_sfnt_off00008672.bin
72359225045374823a24ae884c59fb69d8a73d3090c5904c9a11b13fa5db6271		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8672 11700 bytes

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