Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0160d783fbc9e92…

MALICIOUS

PDF

43.4 KB Created: 2020-09-24 00:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c68ab604cfd6f4ffdd1458da50b7e2b SHA-1: 3e39bbf740bceae46ccfc2a0115eb4d71ccb52b6 SHA-256: e0160d783fbc9e9222fe658a7f6992bee646d0c599dba3794d89ae310c9098be
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic identified a link to a known malicious redirector at `https://ttraff.club/wix?keyword=como+esta+formada+la+uretra`. The document body itself contains the same lure text, indicating the primary purpose is to redirect users to malicious infrastructure.

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.club/wix?keyword=como+esta+formada+la+uretra
    • http://files.casaranovascotia.ca/uploads/1/3/1/3/131379183/vexopifuxakopo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1230/7618/files/4284283380.pdf
    • https://cdn.shopify.com/s/files/1/0432/6886/6214/files/65864285325.pdf
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/cauda_equina_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2269/files/62393604791.pdf
    • https://db55375b-2f64-4a0c-a611-b6bb136b446c.filesusr.com/ugd/efc97f_cd8531f8ecc447e2be975c3572456ae4.pdf?index=true
    • https://6abf1789-26c5-444f-a80f-2e0ca728abae.filesusr.com/ugd/0582e0_ed5279834fa04791af53ebdf3e636b47.pdf?index=true
    • https://e8153287-b7fc-4f6a-bcdd-f30873c0444c.filesusr.com/ugd/4cd51e_05749f399a90405c974dfb4ea899fbb7.pdf?index=true
    • https://fc51d304-8cec-4789-9eae-9cae9a734f7a.filesusr.com/ugd/e1d12c_5f61c5f3d0fa4c97aae480a8189496a2.pdf?index=true
    • https://39830a9b-7c5c-456d-9bf3-6e179776e752.filesusr.com/ugd/5aec95_37c68b17e73a4d7b9361444768a45947.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0486/0051/4720/files/comparative_bar_graph_geography.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/54659649916.pdf
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/vodexumujimenovetoselowu.pdf
    • https://cdn.shopify.com/s/files/1/0450/4682/5110/files/4chan_aco_brap.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_off00006c7e.bin
32527bb3ebc2e1661d5d919981d66788b95581e1efebcb00eae6aab33eeffa4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7E 4960 bytes
font_01_sfnt_off00007d40.bin
47911f48161e600cd1345cd8e4f21dd07b5e597a095c8d57e68437ce5815034b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D40 10516 bytes