Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e263dc25d72b5a…

MALICIOUS

PDF

37.4 KB Created: 2020-08-19 05:27:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57de1d9463fac7a27a162e1a5ed4359a SHA-1: 70367fa36043a418878b2dc169d2ea712c5773f5 SHA-256: 60e263dc25d72b5aca466309c99f809ccbb40990837e3a5de4ed6090985e10f2
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though partially obfuscated, mentions "Charters school sixth form open day", suggesting a lure to trick users into clicking the malicious links. The presence of multiple PDF links, many hosted on Shopify, indicates a link farm strategy. The ML classifier also strongly flagged this PDF as malicious.

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=charters+school+sixth+form+open+day
    • http://files.directaimmedia.com/uploads/1/3/1/3/131383753/7111459.pdf
    • http://zamek.janenicola.com/uploads/1/3/2/8/132814930/vojigekukufetelif.pdf
    • http://rowevuro.puzzle-pieces.org/uploads/1/3/2/7/132712354/cfd10f80.pdf
    • http://files.booneiowasoca.manriquez.net/uploads/1/3/0/9/130970016/778641.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/68582800829.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/gexilaxab.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/54591696127.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/lazikukapupijipalerop.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/twilight_princess_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/37134927317.pdf
    • https://cdn.shopify.com/s/files/1/0431/0332/2261/files/the_iliad_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/75915516108.pdf
    • https://cdn.shopify.com/s/files/1/0437/9282/6528/files/factoring_polynomials_worksheet_math_aids.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/kimekidalilajasug.pdf
    • https://cdn.shopify.com/s/files/1/0440/4002/8325/files/ada_guidelines_2018_service_animals.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_off0000547e.bin
a912172c3fdc5305f78e86921e5aa2c1a9bdc0e2e094232bafb12abede40a330
pdf-font-stream PDF embedded font (sfnt) at offset 0x547E 5468 bytes
font_01_sfnt_off000066fc.bin
a79446a6e080b0a998d1bccd701a89892599d2f39d39c1b3b39c378ff7111272
pdf-font-stream PDF embedded font (sfnt) at offset 0x66FC 9980 bytes