Malicious PDF — malware analysis report

Static analysis result for SHA-256 60761118b64137e9…

MALICIOUS

PDF

43.5 KB Created: 2020-07-31 23:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c178606edd8b1d292e3c143112c8a21 SHA-1: bcc59de792a91ca62b960eef1550f875a9dda936 SHA-256: 60761118b64137e9fc7e17803ec02defd27fa39c316872f7dba4d29ca952a9e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links, many pointing to external PDF files. One critical heuristic identified a link to known malicious redirector infrastructure. The document body contains garbled text but also includes the URL https://ttraff.ru/pify?keyword=raw+karambwan+osrs, suggesting a potential lure or redirection mechanism.

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=raw+karambwan+osrs
    • http://files.chwpress.com/uploads/1/3/1/4/131408245/lamezul.pdf
    • http://files.tavernegoudenpunt.be/uploads/1/3/2/6/132681194/dasagozunonapodeve.pdf
    • http://files.solutionslocker.com/uploads/1/3/1/6/131606493/pikanatumirarajune.pdf
    • http://files.michellestartzmanmetalwork.com/uploads/1/3/0/9/130969306/diwodi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/3862/9288/files/riwekaladed.pdf
    • https://cdn.shopify.com/s/files/1/0439/7747/4206/files/95644842288.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/18404559597.pdf
    • https://cdn.shopify.com/s/files/1/0435/6666/1800/files/26460719421.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/979877759.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/93708653598.pdf
    • https://cdn.shopify.com/s/files/1/0434/6616/2341/files/tumepawutubujoduwuxixewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/3176266628.pdf
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/50429451887.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/wibonebikuvamute.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060f0.bin
24866fab093542dbf556b174a3ec2b6de0a92142bfae8369ba8c12808fe74f08
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 4644 bytes
font_01_sfnt_off00007095.bin
340b4a662e5af60e15d73fb37ffb1efd416011b0977f4f6dbdb6dadd2b86f8a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7095 10192 bytes
font_02_sfnt_off00009368.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9368 4324 bytes