Malicious PDF — malware analysis report

Static analysis result for SHA-256 713e43a02a4178f3…

MALICIOUS

PDF

45.1 KB Created: 2020-08-04 05:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b13de88ca6cd44b2cf1f7aba0b057e1 SHA-1: 50f0c7c23bfd5dd729a3eedb47031302fc02c337 SHA-256: 713e43a02a4178f301567d848f0358c61e7adde0d516a6320ea09069a263ef48
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to a link farm infrastructure. One of the primary links, 'https://ttraff.cc/pify?keyword=brimonidine+alphagan+davis+pdf', is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to direct users to malicious sites, likely for phishing or malware distribution.

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/pify?keyword=brimonidine+alphagan+davis+pdf
    • http://files.marrsrail.org/uploads/1/3/0/7/130775747/f0cfdc7022.pdf
    • http://files.easttexasplacenta.com/uploads/1/3/1/3/131384071/tefurukelinav.pdf
    • http://files.chanelyourthoughts.com/uploads/1/3/2/6/132681910/sewifen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4455/2354/files/zevijoduladibetitixub.pdf
    • https://cdn.shopify.com/s/files/1/0440/3462/1590/files/ninematixotuvilubasuliko.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/72838034507.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/yz250_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/bjt_amplifier.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/badubazaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4649/3605/files/wonaxinujejivij.pdf
    • https://cdn.shopify.com/s/files/1/0432/4904/1563/files/48825537276.pdf
    • https://cdn.shopify.com/s/files/1/0437/3128/8216/files/bexawutelirofuvaxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/9141916782.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_off00007181.bin
7b6007aa98fe376ea1d71cfc15083c4cd1742af970042c1754a4575419bdaede
pdf-font-stream PDF embedded font (sfnt) at offset 0x7181 5564 bytes
font_01_sfnt_off00008446.bin
1b786eb32b59561b52138e4e57722e1ab030a7438068446d08e8706f942171c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8446 10376 bytes