Malicious PDF — malware analysis report

Static analysis result for SHA-256 292f9fed57caa295…

MALICIOUS

PDF

46.0 KB Created: 2020-08-15 01:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8964c28cd3d30a4f7f779493afe00d8 SHA-1: 72117284a32e1312f847e39c193ecd0a8dada985 SHA-256: 292f9fed57caa2956c72a4eb3efa889339721db9f73bafffd7d3844f19aebe6d
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains the text 'Guided tour vatican gardens' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=guided+tour+vatican+gardens
    • http://files.drgaranzuay.com/uploads/1/3/0/7/130738836/kusifa.pdf
    • http://gopolop.jamesedwardhughes.com/uploads/1/3/1/4/131437709/vevimenarog-rokaduwilakef.pdf
    • http://files.sesbaby.com/uploads/1/3/0/7/130776786/e92a40b40ef25f4.pdf
    • http://files.aliceandhenrynaturals.com/uploads/1/3/0/8/130814208/9a59735d5.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/tewoj.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/teberipojugemuwusemozuni.pdf
    • https://cdn.shopify.com/s/files/1/0437/9354/7426/files/44956171787.pdf
    • https://cdn.shopify.com/s/files/1/0435/9651/3448/files/janelekozu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/lenabimiviwimu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5197/4818/files/dolch_primer_sight_words_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/1760/8090/files/alternative_investments_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/85471267067.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3101/files/vaaste_movie_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2861/files/economist_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/xibadutudajebukegowes.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_off00007796.bin
a2ba13920539e58fb0b9f7676ac178a6948d54eccabd92873a73817f16c91f54
pdf-font-stream PDF embedded font (sfnt) at offset 0x7796 5164 bytes
font_01_sfnt_off00008938.bin
c50ae5a76d4e1f07b175367a645f84af5b310e47d9a44467e28bc53214a499e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8938 9996 bytes