Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a56a991fa3bdc3…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 04:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 430a31e93e6e0c42d71ddac540f30237 SHA-1: c2e8e5b2bfdeacef221fb7db638869e00b1e3b23 SHA-256: 64a56a991fa3bdc3dd74a0f2c198acd4d098ad8524ffeb5e93a1c1ba1123457a
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a news-related topic. The presence of numerous external links, many pointing to Shopify-hosted PDFs, suggests a link farm or SEO poisoning tactic to distribute the malicious URL. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/wix?keyword=the+daily+drucker
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4749/3536/files/saratanisivafoduxituluwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92702877098.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/vaimanika_shastra_book_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0438/5354/5632/files/genenoxoxawopife.pdf
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/roman_art_and_architecture_mortimer_wheeler.pdf
    • https://cdn.shopify.com/s/files/1/0437/2866/6785/files/zuzij.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/xunelinisigat.pdf
    • https://cdn.shopify.com/s/files/1/0429/1503/7343/files/extentreports_for_selenium_maven_dependency.pdf
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/cobra_kai_season_2_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/0073/3596/files/kedefe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/ll_bean_flannel_sheet_sets.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/suwalosutibizigisalixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/takusodedudor.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/axis_bank_my_zone_credit_card_application_form.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_off00006704.bin
d9d37846a299127bc278c0c4abe30948375ab1b034c5e0ddbdc4fab0c8391b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x6704 4964 bytes
font_01_sfnt_off000077e3.bin
9f3b3783c2ee5888582d0ab375f7dfdeae5978758a87e85a0095de897e276dd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E3 9876 bytes