Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9d4f8e89e3954d…

MALICIOUS

PDF

43.6 KB Created: 2020-08-19 23:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ddb99a8053beb001e1dc94e9c230deb7 SHA-1: ec20c7dc86eab01a7bbe5db8c66413c998b4ca79 SHA-256: 1b9d4f8e89e3954d429b4d599a1fda2ec08ca58a575844385ab43640ae664825
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as a "Canon digital photo editor" download. The document also hosts a large number of other PDF files on Shopify domains, likely as part of a link farm to improve search engine ranking and distribute the malicious link. The ML classifier 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=canon+digital+photo+editor
    • http://files.polaroidsandapostcard.com/uploads/1/3/1/0/131069897/5992977.pdf
    • http://files.garrart.com/uploads/1/3/0/7/130775628/985b006ab2d6.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/72505594177.pdf
    • https://cdn.shopify.com/s/files/1/0439/2294/8251/files/moxejipivegivogapu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9180/2777/files/27981214816.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5922/files/26220670106.pdf
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/38478568358.pdf
    • https://cdn.shopify.com/s/files/1/0438/9899/4856/files/51383177448.pdf
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/benim_hocam_tyt_matematik_soru_bankas.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/sadogatugogebogomanatex.pdf
    • https://cdn.shopify.com/s/files/1/0435/4854/1079/files/denenosikuketima.pdf
    • https://cdn.shopify.com/s/files/1/0443/3425/2188/files/calicut_university_distance_education_question_bank.pdf
    • https://cdn.shopify.com/s/files/1/0436/3304/9753/files/4932537568.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/sujuwuwuxaxobuwukiled.pdf
    • https://cdn.shopify.com/s/files/1/0430/7212/7125/files/swedish_english_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0870/4164/files/effects_of_air_pollution_on_health.pdf
    • https://cdn.shopify.com/s/files/1/0437/6009/1287/files/28636110262.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_off00006e23.bin
8d92a539b501d56c0bd91e5fdc6dcc3526e3870a06df0e63dea3dbbd945bd3d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E23 4948 bytes
font_01_sfnt_off00007eeb.bin
583ea3e1a54a8c9a65463cbc0ebecf299bae20e074a9d33f6083371f84c65a12
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEB 10248 bytes