Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f795d2e75c29481…

MALICIOUS

PDF

41.9 KB Created: 2020-08-06 14:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df769638436e2c8157d4389fb49f83b3 SHA-1: 0df37fb0e7268145a85e8824ec62bc5c1590729c SHA-256: 5f795d2e75c29481a06f1db6335ba5a0b620772f66c6e392733390306749820a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which are designed to appear as legitimate resources but ultimately redirect to the malicious domain ttraff.ru. This technique is commonly used to distribute malware or phish for credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect the user to a harmful site.

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=amalgamation+of+companies+notes+pdf
    • http://files.springlineseafood.com/uploads/1/3/1/0/131069869/xapurusig.pdf
    • http://files.surrenderedheartsnm.com/uploads/1/3/1/4/131454523/valopew.pdf
    • http://files.theempoweredspoonie.com/uploads/1/3/1/6/131636728/jafujuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/data_analysis_in_python_with_pandas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1000/6940/files/80947089925.pdf
    • https://cdn.shopify.com/s/files/1/0437/4983/4901/files/catalogo_del_sat_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/4012/9692/files/zapigumanobunavesipez.pdf
    • https://cdn.shopify.com/s/files/1/0436/0408/2851/files/tefeluwakakutojekira.pdf
    • https://cdn.shopify.com/s/files/1/0437/2840/4632/files/dorumet.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/54105969873.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1642/files/51740109454.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/rijewadidimitaraxikuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/jigebed.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000659b.bin
acfe34365db6b6cc9724d3f3099f93b9c1872a1e4485f80006c500beaede9fec
pdf-font-stream PDF embedded font (sfnt) at offset 0x659B 5368 bytes
font_01_sfnt_off000077d5.bin
33b31646f7aeb81bb9b1e8d11bcdbfd1e4d29fca0b107a0fe1d40a2b08a16bfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x77D5 10160 bytes