Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b03cb01b796680…

MALICIOUS

PDF

37.6 KB Created: 2020-08-18 23:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a781eda755e5e6898ed45404a82ca2f SHA-1: 679c9ff29465e7f575aecdfb96eab0b62549e7fb SHA-256: 22b03cb01b79668008790ff179b63f98c83316558051e0170ed95f8277c5e76f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier and contains a large number of external links, a technique often used for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=asoka+movie++moviescounter', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of numerous shopify.com links, while many are benign, contributes to the link farm heuristic.

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=asoka+movie++moviescounter
    • http://files.justdelightfull.com/uploads/1/3/1/8/131871864/tukutenineni-babegig-fopuzobaximas.pdf
    • http://rijefewiw.underthemidnightmoon.com/uploads/1/3/1/1/131163599/fawudegulesil_libik_sarorosa.pdf
    • http://files.rebeccakallies.com/uploads/1/3/1/3/131378990/dujowejumafukurim.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/28740072027.pdf
    • https://cdn.shopify.com/s/files/1/0435/6256/5795/files/determination_of_total_alkalinity_of_water.pdf
    • https://cdn.shopify.com/s/files/1/0431/7167/6314/files/semijudiginojosutinopekus.pdf
    • https://cdn.shopify.com/s/files/1/0436/9563/6633/files/5089305998.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/tufiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9918/4551/files/chuyen_doi_tu_sang_jpg_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/8356/3162/files/list_of_words_with_synonyms_and_antonyms.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/xosaboxefo.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/38914176861.pdf
    • https://cdn.shopify.com/s/files/1/0432/5195/7923/files/lepefafojurizorusod.pdf
    • https://cdn.shopify.com/s/files/1/0436/7020/8662/files/69178663982.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_off00005580.bin
f4809db553c6ade607f8396b2a40eedd5af3faef002b2ed6dd277736c9cf7dcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5580 5024 bytes
font_01_sfnt_off00006689.bin
d36695740e952512419100c31285b41d4fac6d69b762cd2a4213ce59b3d9fb82
pdf-font-stream PDF embedded font (sfnt) at offset 0x6689 10328 bytes