Malicious PDF — malware analysis report

Static analysis result for SHA-256 1962bdb5523a0617…

MALICIOUS

PDF

42.0 KB Created: 2020-08-17 10:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df072340afe46c65d5f96e206b9a8320 SHA-1: 7513338731e149ede98b4d154fa22f6f82615f5c SHA-256: 1962bdb5523a06176fda69301fe4702ad6fbaea1f8dfd347aeebdb9596078595
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.com/pify?keyword=guide+vert+michelin+belgique`. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to various PDF documents, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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=guide+vert+michelin+belgique
    • http://files.familycrisisresourcecenter.org/uploads/1/3/1/8/131871859/pivasivolepejex.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0004/4454/files/applied_drilling_engineering_bourgoyne.pdf
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/john_deere_x585.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/domalufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/76678127336.pdf
    • https://cdn.shopify.com/s/files/1/0429/8407/9523/files/79019628916.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zutowujovepenatugipo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/xigaxuzogalunivepop.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/although_despite_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/guided_reading_levels_first_grade.pdf
    • https://cdn.shopify.com/s/files/1/0440/9887/9640/files/4206166949.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7394/files/19938869699.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_off0000672f.bin
e0fcc31afb9f4f43e495283a542bbb0657b5b87678c5a4e31fa3206e79302efe
pdf-font-stream PDF embedded font (sfnt) at offset 0x672F 5324 bytes
font_01_sfnt_off00007921.bin
f5f11072e1f17f19411481ea68e4baa3c8f4cb8d50390fc7dcd435d509b97a0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7921 10012 bytes