Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b669247cacd1caa…

MALICIOUS

PDF

42.6 KB Created: 2020-08-16 00:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b77a28347542ab6ef3f8273a3db17ae SHA-1: b732329337f8789c53183967e5576debf369c856 SHA-256: 1b669247cacd1caae3763ad411ab7b97c205c80e5c4ab96d6fd4289dd453165d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier and contains multiple embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=laser+ignition+system+pdf+free'. Another critical heuristic indicates the PDF acts as a link farm, with numerous external links, many pointing to shopify.com domains. The document body, though partially corrupted, also contains the 'https://ttraff.com/pify?keyword=laser+ignition+system+pdf+free' URL, suggesting the primary intent is to redirect users to malicious content.

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=laser+ignition+system+pdf+free
    • http://files.sunnybrookranch.com/uploads/1/3/2/6/132695301/a5acec1030e.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/abecedario_fonetico.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/38497106269.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20880330559.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/pevovepi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6594/9862/files/wuxidezobiti.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/nibetofowij.pdf
    • https://cdn.shopify.com/s/files/1/0430/4764/9429/files/79149226385.pdf
    • https://cdn.shopify.com/s/files/1/0433/6081/3208/files/kitakifegigiwerisedavexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2423/6199/files/alfredo_bosi_dialetica_da_colonizao.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/vewiwidibeza.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/nexox.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c91.bin
0cf296c7dc455ad9f1c50ea01104d04422d294f040df19c877036f7bc6a17365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C91 5160 bytes
font_01_sfnt_off00006e0c.bin
3d6cb889bf7c3fa3d8339e2c2ae1573a2bbb6ea511d927b5c9e545aa95e5c281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 9972 bytes
font_02_sfnt_off00008fda.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FDA 4324 bytes

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