Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a4276f09430d50…

MALICIOUS

PDF

43.3 KB Created: 2020-08-07 02:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a66a0d5d8af6c350f6345f0b3236f00a SHA-1: 19bc6727d8088ed32f8009eac014595e7016a954 SHA-256: a1a4276f09430d503a0aa1fb9f457fc9494dd142cd5bcc0b89a37dbca733205f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=biological+classification+pdf+class+11'. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.com/pify?keyword=biological+classification+pdf+class+11
    • http://files.learnguitar4fun.com/uploads/1/3/1/8/131856381/8522082.pdf
    • http://files.mastertimothy.com/uploads/1/3/1/4/131409693/9096171.pdf
    • http://files.nwasuzukistrings.com/uploads/1/3/1/3/131381363/jiwemoseguv.pdf
    • http://files.wildlife-safari-consultants.net/uploads/1/3/0/7/130775320/lurorul.pdf
    • http://files.wispofwords.net/uploads/1/3/1/0/131070561/pamebelamagupe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/naketumodajoduxowaxiso.pdf
    • https://cdn.shopify.com/s/files/1/0437/0857/9993/files/anatomy_and_physiology_of_brain_and_spinal_cord.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9186/files/7621699235.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/1242485974.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/65836993826.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/vuriwigezadovokejoreba.pdf
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/bbw_foxy_roxxie.pdf
    • https://cdn.shopify.com/s/files/1/0429/2434/3462/files/pcos_journal_articles.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4343/files/46322035558.pdf
    • https://cdn.shopify.com/s/files/1/0448/4582/6210/files/ross_tech_wiki.pdf
    • https://cdn.shopify.com/s/files/1/0437/9036/8929/files/kuta_software_factoring_quadratic_expressions.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6522/files/12692698302.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_off000069e7.bin
1a98fa8ddadc71454c9f6d6b712bd170504bae31256817cc85380180239320dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x69E7 5328 bytes
font_01_sfnt_off00007c29.bin
bab8404dce03284fe6bc1a29e79574cb9f3faca27668e9ec57bf02789a894af9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C29 10684 bytes