Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ad2acc2838e186…

MALICIOUS

PDF

40.8 KB Created: 2020-08-12 17:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb3ad6766e1c093d0d74e5a4fad2703b SHA-1: aa015085428b249bee8e99c65e2916b62a2a9ba3 SHA-256: e2ad2acc2838e1867670456203bec02d62d5a57104ed80a17c6f5953cf1c0921
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The primary malicious link identified is https://ttraff.cc/wb?keyword=dialogue%20immobilier%20en%20anglais%20pdf, which is flagged as a malicious redirector. The document body, though partially garbled, contains text related to real estate and the PDF's creation, suggesting a lure. The ML classifier strongly indicated maliciousness.

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/wb?keyword=dialogue%20immobilier%20en%20anglais%20pdf
    • http://mobejorig.weeyasmith.com/uploads/1/3/2/8/132814930/rovudegogulufu-fekesikaz-jusuwu-maragosijipolot.pdf
    • http://vawipew.children-families.org/uploads/1/3/1/4/131454165/78f71d5.pdf
    • http://files.rueckkehrzentrenschliessen.org/uploads/1/3/0/7/130739393/wesiguxan-saxanopirupox.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0605/files/nolurozo.pdf
    • https://cdn.shopify.com/s/files/1/0448/9238/9531/files/kadidaxorufulobixorezuta.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/69154249855.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4583/files/koxite.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/82501233556.pdf
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/32075968948.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/9571999843.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8381/files/wojuxoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/nodibupilalusumuwoton.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4541/files/jimewipamolefoj.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_off00005c3f.bin
68d30222eaeb022d59d3ca00a0b63961b596854a143676d4be1059f330a5ac0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3F 5500 bytes
font_01_sfnt_off00006ed0.bin
34e89b767f689e4111d412ff51aa65bebaeefcd01ad17c67db23041fbfa255c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED0 12136 bytes