Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4d19c99ec59e40…

MALICIOUS

PDF

36.5 KB Created: 2020-08-19 06:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c99c0a2eec2cbcc643a6d452721afba1 SHA-1: 422427240d5c871a13a034bbfd5f323f662ef728 SHA-256: 7c4d19c99ec59e403f8be69a374490f15496da7978fa7b95a0cdd122de0a9491
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The document body contains a URL that is also listed as a known malicious redirector. The presence of numerous external links, many pointing to Shopify domains, suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the PDF structure itself is the vector for the attack.

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.ru/pify?keyword=lacrimosa+piano+sheet+music+easy
    • http://files.sewsweetdesigns.net/uploads/1/3/2/7/132712266/labelax-dusak-powosoruvamik-lumuxerutenufi.pdf
    • http://fezepudas.katiecoon.com/uploads/1/3/0/7/130775934/zanesigoz-gakal.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/english_word_song.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/henry_and_ribsy.pdf
    • https://cdn.shopify.com/s/files/1/0430/8982/1847/files/rizibajemomulanuzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/mathematical_logical_reasoning_questions_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/darelilujazadewatobuneku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0399/files/beretta_tomcat_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9787/3831/files/math_for_grade_1_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/6_puntos_del_acuerdo_de_paz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/architectural_plan_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/classroom_management_techniques_jim_scrivener.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/zuvozakidixanelabenevi.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/
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/zuvozakidi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000522e.bin
64d6bbd48a4b06e3532900b98d7b52db6d8cb9a08ef82c1bbc57c1c7c874d480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x522E 5184 bytes
font_01_sfnt_off000063af.bin
396520c89abe48e128cac2cc77b8e06007b0c1f2fb563315df9977d4fe643874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 9884 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.