Malicious PDF — malware analysis report

Static analysis result for SHA-256 03835de8d7624088…

MALICIOUS

PDF

38.8 KB Created: 2020-08-26 12:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c648c4debe2124312c66863a40a8155c SHA-1: a22d71c206a454345a2bd4aca519ca1a1f92dc7f SHA-256: 03835de8d7624088bffdaa59f9a5f2f6964c5cf67ffc1eec7fa170ec770b82b4
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=python+rules+engine'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. While no scripts were explicitly extracted, the presence of malicious redirectors and a large number of links strongly suggests a phishing or malware distribution attempt.

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.com/pify?keyword=python+rules+engine
    • http://sixisiren.lickcream.com/uploads/1/3/0/8/130814124/627cf2.pdf
    • http://files.natwellsupplements.co/uploads/1/3/0/7/130739153/sijelebekadejimut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0447/1426/2682/files/north_and_central_america_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/0247/0306/files/riesgo_laboral_en_enfermeria.pdf
    • https://cdn.shopify.com/s/files/1/0430/3673/7699/files/63944432676.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/26819478556.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/prim_s_algorithm_java.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/gojirukinuzuwugewif.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/emt_interim_exam_2_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/yu_gi_oh_duel_generation_campaign_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/niwovavitepedurelisiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/16870462322.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_off00005ad0.bin
42ee832cf6a3af64ac0cd4fc0d857440bfe3b6c159631c8cab0301fb56795097
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD0 4840 bytes
font_01_sfnt_off00006b43.bin
542719e36318efbf422b77f58d2384e08da4b534554538d3973e707deea5245a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B43 10468 bytes