Malicious PDF — malware analysis report

Static analysis result for SHA-256 7601ddbdbf16eef1…

MALICIOUS

PDF

41.7 KB Created: 2020-08-24 17:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e076f988f1992852f6b54ab3c32ce54c SHA-1: 6eada29b90e192054e998be63e4f64a39d8d27c3 SHA-256: 7601ddbdbf16eef1150796c47facf2439bc9cc1d5f0b4e301cf9e1f35ddfde6e
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.com, which is disguised as a Runescape crafting guide. The document also functions as a link farm, pointing to numerous other PDFs hosted on Shopify. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs confirms the intent to redirect the user to external, potentially harmful, content. No scripts were extracted from this sample.

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=runescape+f2p+crafting+guide+with+profit
    • http://files.besafesafetysupplies.com.au/uploads/1/3/2/3/132303264/6488667.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1322/6143/files/96749566500.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/lodelakixasuruxagaxonope.pdf
    • https://cdn.shopify.com/s/files/1/0440/4595/9333/files/vebebisuluvewilo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/21187434010.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/46249556517.pdf
    • https://cdn.shopify.com/s/files/1/0451/1078/8261/files/97012904176.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1492/files/babylonian_talmud_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/bengali_movie_songs_dj_remix_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4571/files/mujusotadukemaposufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/92858683374.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6149/files/jalolodivodid.pdf
    • https://cdn.shopify.com/s/files/1/0445/3544/7711/files/actuator_working_principle.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1670/files/32832661777.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_off000063c9.bin
c4dd392f08405c454ae1b8688e98901c21bb7037c4ab08e6e5bf7678419ee09d
pdf-font-stream PDF embedded font (sfnt) at offset 0x63C9 5616 bytes
font_01_sfnt_off000076f4.bin
8e714f975b154a627631057c546318b598f59cde51a0f4ba00aa46bff6c40e37
pdf-font-stream PDF embedded font (sfnt) at offset 0x76F4 10256 bytes