Malicious PDF — malware analysis report

Static analysis result for SHA-256 3481b5e16e00b9be…

MALICIOUS

PDF

45.4 KB Created: 2020-08-06 11:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2359a7fa4ed94f3bb59d87cdc9ee435 SHA-1: e0704e9da1fbf921745d9ff83ebdc74a502e58c6 SHA-256: 3481b5e16e00b9bec4deb129673ac127ec12770d5495914f50efb3ccd4fada70
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it's a malicious redirector link, pointing to ttraff.cc. Further analysis reveals a link farm of SEO-optimized PDF files hosted on various domains, including Shopify, designed to lure victims. The ML classifier strongly supports the malicious nature of this document.

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.cc/pify?keyword=bandler+richard+pdf
    • http://files.3bdesigns1.com/uploads/1/3/1/4/131406036/fugamovisede_tenogadumugova_wavodemozuwip_fuwaro.pdf
    • http://files.thenauticalartsworkshop.com/uploads/1/3/1/6/131606035/bikebawifutir.pdf
    • http://vidupol.autismsupportgroup.org/uploads/1/3/1/4/131453284/540c4e0f951.pdf
    • https://cdn.shopify.com/s/files/1/0432/6830/9152/files/papuvozusuvunoru.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/furimadezirafomoxed.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/mitusujobitifaxevivaxev.pdf
    • https://cdn.shopify.com/s/files/1/0431/5067/2026/files/fudenurinezesoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/4388/1114/files/rekadudaxem.pdf
    • https://cdn.shopify.com/s/files/1/0430/6036/3413/files/lunopobezesexaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18842325712.pdf
    • https://cdn.shopify.com/s/files/1/0432/2253/2251/files/battelle_developmental_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0438/2910/0701/files/24578247111.pdf
    • https://cdn.shopify.com/s/files/1/0437/9262/9917/files/66496669654.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/runubuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/merge_files_mac_os.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000687e.bin
e0637465367267ce07b2345fd07edeac10393a40568395986d1c961764c1547a
pdf-font-stream PDF embedded font (sfnt) at offset 0x687E 4712 bytes
font_01_sfnt_off00007864.bin
90a802638753675464e5f94dd652258f99f7d21f705de35e94e5dba7e4a7bb6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7864 10112 bytes
font_02_sfnt_off00009b0b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B0B 4324 bytes