Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2430e003a38a5ab…

MALICIOUS

PDF

40.8 KB Created: 2020-08-12 10:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c78b1f88d1a8bf2f4b6832cb25f3b1ed SHA-1: aff4bd72a78eedcf239d72f3f0800d88f6e4572a SHA-256: d2430e003a38a5ab5721b4911f09b013bd4445c0b4b0ae15e73384c88d53c4f8
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to lure the user into clicking this link, which then likely leads to a phishing page or malware download.

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=procedure+campus+france+togo+pdf
    • http://files.birdseywoodworking.com/uploads/1/3/2/6/132681617/pipat.pdf
    • http://files.anna-walker-research.com/uploads/1/3/1/4/131414134/wuvifufetabok.pdf
    • http://files.andrebretonracing.com/uploads/1/3/0/8/130813948/9197086.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1587/files/xerif.pdf
    • https://cdn.shopify.com/s/files/1/0429/6933/3916/files/compelling_conversations_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/53207297829.pdf
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/66982178834.pdf
    • https://cdn.shopify.com/s/files/1/0432/2508/8168/files/tunewipovosutovugez.pdf
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/zujomijepigada.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kafojisiguzisov.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/4573366869.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1080/files/estado_de_bienestar_definicion_y_caracteristicas.pdf
    • https://cdn.shopify.com/s/files/1/0429/4210/3719/files/balancing_redox_reactions_oxidation_number_method_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55742160690.pdf
    • https://fr-tg.capago.eu/
    • 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_off000060bf.bin
04b5ed08724e828b6f3e68d7d10a8b091a5c09f93ad7fc44955f834f26b01a34
pdf-font-stream PDF embedded font (sfnt) at offset 0x60BF 5444 bytes
font_01_sfnt_off00007321.bin
e6f56b408b706b6bd4670160f1dd70819fe4fbd9187e86ae8a8e866510663cfe
pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 10352 bytes