Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ca17b61fde5b2fb…

MALICIOUS

PDF

42.8 KB Created: 2020-08-19 10:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6da9435622a21bbf6668da08fd270f8e SHA-1: 75592de181bfe5be33d3a6a9ba13bb1df61c7106 SHA-256: 6ca17b61fde5b2fbeb9f2cb092d7c0b3703c25756b5a1b2fa2780afcfe458e4a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, many of which point to a link farm hosted on Shopify, and one critical link redirects to known malicious infrastructure via ttraff.com. The document body, though heavily obfuscated, contains text related to 'mandated reporter training california in spanish', likely a lure to encourage clicks. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or redirection attack.

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=mandated+reporter+training+california+in+spanish
    • http://files.vicarioustyle.com/uploads/1/3/1/4/131484133/fokofi-fiwugexa.pdf
    • http://files.newseedspriory.org/uploads/1/3/2/6/132681698/8786987.pdf
    • http://files.karinas-boutique.com/uploads/1/3/2/6/132682204/norovekivedaji.pdf
    • http://dozud.lionessenergetics.com/uploads/1/3/0/8/130813332/6a0918.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/4561/2694/files/free_speedometer_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/belkin_n300_wifi_range_extender_f9k1015_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/28318786359.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/luxezejirelivurum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5682/files/dekumelifanupumuwubesi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9947/8434/files/least_common_denominator_finder.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/63983168457.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_off00006849.bin
bff693fad9f884b3179ae00d75d0e8d0b824ca5d5fd04be3105be77863995b4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6849 5424 bytes
font_01_sfnt_off00007ab4.bin
aaddcfc29bdf276278c756fac37d802b81dff12178f9a8280f81f80b86b02b8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB4 10528 bytes