Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba0df78d4ff5cdf…

MALICIOUS

PDF

65.7 KB Created: 2020-08-17 00:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f3adaffaa7069ef23cd8a2bd634181c SHA-1: ebf89d7af6fe3f098abfabdd50f24f0b75aa384a SHA-256: 9ba0df78d4ff5cdf24d231fff113785b6ea6e823731c5d1f3547a8ce68707611
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a malicious redirector at 'ttraff.cc', which is designed to lure users into downloading further malicious content. The ML classifier strongly indicated maliciousness, supporting the presence of these malicious links.

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=risk+management+pdf+book
    • http://files.adventure-emporium.net/uploads/1/3/0/7/130740112/cb1335a3.pdf
    • http://files.dceoralhistoryproject.org/uploads/1/3/1/4/131453429/jazaxeni_fizofi.pdf
    • http://files.wendycharlton.net/uploads/1/3/0/8/130873783/xedenifogimuzefik.pdf
    • http://files.beverleywa.com/uploads/1/3/0/7/130775346/sirivogewimipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/aprender_a_leer_nios.pdf
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/33297588121.pdf
    • https://cdn.shopify.com/s/files/1/0435/1872/2216/files/modern_physics_randy_harris_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1816/5144/files/the_crucible_hysteria_blame_chart_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/9175/3115/files/candlesticks_explained.pdf
    • https://cdn.shopify.com/s/files/1/0434/2625/0917/files/26244003143.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58933331969.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/46280249039.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/xajivuxidabox.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/92091234062.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/molupifupe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9689/8724/files/wafejugapisenufet.pdf
    • https://cdn.shopify.com/s/files/1/0433/4691/9579/files/pozazamepaze.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_off0000c37c.bin
a95b86b5e8b918c37e93e9ac46b15c1b1e0dce205b25ba15ac57121396e1359e
pdf-font-stream PDF embedded font (sfnt) at offset 0xC37C 5444 bytes
font_01_sfnt_off0000d5ec.bin
8c14cb4e703c21ad7c5e246fc2048a479913db80c0daaaf075b3c97813480f9e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EC 10452 bytes