Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce27299ef19fb8cd…

MALICIOUS

PDF

41.7 KB Created: 2020-08-22 05:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c07c6fe0833ff2b764d1279893aaa46 SHA-1: d1940e3a17961ef2fa5dc811ad084ce7e1ea6b68 SHA-256: ce27299ef19fb8cd4e8fc86d04dc7b4efbfdc63684be5ca42754dfd663525569
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL pointing to a known malicious redirector. This suggests the document is part of a phishing or scam campaign designed to lure users to malicious sites. The ML classifier also 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.ru/pify?keyword=get+past+participle+form
    • http://files.towsonmartialarts.com/uploads/1/3/2/7/132712315/posejiwesuzop.pdf
    • http://files.vetatrv.com/uploads/1/3/0/7/130776110/pasuvitifarajojilol.pdf
    • http://suzuru.engforu.com/uploads/1/3/2/7/132712207/gigojawefuvise.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/82508825567.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/48642789987.pdf
    • https://cdn.shopify.com/s/files/1/0461/7558/4419/files/94989281864.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/pugoxapijeronowokelugadin.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/asme_pcc_1_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/minecraft_tinkers_construct_duritae.pdf
    • https://cdn.shopify.com/s/files/1/0433/4718/1718/files/genovubutigupubikabosepu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1245/4557/files/32138097189.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/33558275282.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/padolabo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058c1.bin
fcd431fae2b0183632f072d37e66a9a4b661bb9c1677270e7042f6c0aa63b7eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x58C1 5192 bytes
font_01_sfnt_off00006a55.bin
2f911f284d5757b641b6e1de3db2b69b058b5a90fa7d4b4005592d1b4e52ad36
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A55 4008 bytes
font_02_sfnt_off000076f8.bin
90c68ada73fa571995c1e23db1d1cd176b820fcc22dcb16e0ab9d38f11f5d855
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F8 10272 bytes