Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a6cb1932ad3ece…

MALICIOUS

PDF

34.6 KB Created: 2020-08-28 01:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ee85093bbe50a16c74ed7b3f9d8deff SHA-1: 02f07a3cb718cb5337f68781e9c597bf7dbceb0e SHA-256: 36a6cb1932ad3ece9bf7b1bb7d2f88e92de678ed8c56846b2289a4cb49ce00db
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=composite+risk+management+civilian+b'. It also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains hosting other PDFs. The ML classifier strongly indicated maliciousness. The primary attack pattern involves luring the user to click the malicious link, which likely leads to a phishing page or malware download.

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=composite+risk+management+civilian+b
    • http://kojux.f-c-f.net/uploads/1/3/0/7/130738993/rugazapes.pdf
    • http://tazani.drherbal.shop/uploads/1/3/0/7/130740178/1149829.pdf
    • http://files.westerngate-fta.org/uploads/1/3/1/3/131381259/kokudegonodi.pdf
    • http://files.dkg-betadelta.org/uploads/1/3/1/0/131070192/legixom.pdf
    • http://files.crookedcreekfarmsvalpo.com/uploads/1/3/0/8/130814279/vexejusatupowu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4480/5525/files/24817491815.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90840236881.pdf
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/joxesokuxapuwufunuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9966/files/62654932888.pdf
    • https://cdn.shopify.com/s/files/1/0464/7256/0790/files/jagivafafugajudonaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7184/0161/files/96063154223.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/jafagubetura.pdf
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/vetipakoxofalipola.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/cover_letter_in_spanish.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_off00004aa9.bin
59f329bfa1245425d3e3117926ce0016542e3cefe081a7b7f10821e04f100845
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AA9 5424 bytes
font_01_sfnt_off00005d0a.bin
80df74224c98a11119c2db701b12bc650ca20506daeed92bd22677d57f4a581c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0A 9604 bytes