Malicious PDF — malware analysis report

Static analysis result for SHA-256 89db8b56ba5680e1…

MALICIOUS

PDF

54.2 KB Created: 2020-08-22 00:31:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 193880ff6264c97d1d6d92db19f4ce71 SHA-1: ea65890c7bf194cf2214faab97b9422e357da377 SHA-256: 89db8b56ba5680e1349a4a6cd16e08dc3e31eeafdf5c83af3920badaeac88941
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a link to a known redirector (ttraff.com). This redirector likely serves as a gateway to malicious content, such as phishing pages or malware downloads. The PDF also contains a large number of external links, many pointing to shopify.com, which is characteristic of SEO link farm abuse. The ML classifier strongly supports the malicious verdict.

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=manualidades+con+pinzas+de+madera+peque%25C3%25B1as
    • http://files.bampteam.com/uploads/1/3/2/6/132695232/refopiw-guzafusizugamap-gotaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82505274200.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/43268078427.pdf
    • https://cdn.shopify.com/s/files/1/0430/4335/6821/files/gafurutuzavowidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/weider_pro_4300_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6088/6694/files/11828090876.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5271/files/bixexeliwe.pdf
    • https://cdn.shopify.com/s/files/1/0436/9039/3755/files/narasimha_kavacham_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0432/0785/2192/files/fijavazelenagopaxobapuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4000/4501/files/tigifibusubuvuva.pdf
    • https://cdn.shopify.com/s/files/1/0437/3839/8869/files/gimp_fonts_list.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006df6.bin
94cfa8eb88257b41fe5003253a1877b3e1d81dc19e0e79ee70b08d763f4c69c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF6 5412 bytes
font_01_sfnt_off00007ff5.bin
01396fa8d8f736f714c161fcf6b1800c26df33973eb9e9bebaa83bf1c372865b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF5 11376 bytes
font_02_sfnt_off0000a532.bin
c3d0ee408bee49a88931d2ac630a9fb52e88a46fabab5a72aa19e78bbe1d3826
pdf-font-stream PDF embedded font (sfnt) at offset 0xA532 16376 bytes
font_03_sfnt_off0000bada.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xBADA 4324 bytes