Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7e70709c22b5b3…

MALICIOUS

PDF

42.1 KB Created: 2020-08-10 10:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39c776f53604db6cf20f87e794c6362e SHA-1: e95cd222a0270637b01e37a92b01a7b0184e61a4 SHA-256: 5a7e70709c22b5b3bd95b61e701fa9e127a7fcf3fe2e118ea2acc8c001e4229e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text related to editing PDFs and includes the malicious URL. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood 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.ru/pify?keyword=editing+pdf+file+on+ipad
    • http://files.bullbearkidsbooks.com/uploads/1/3/2/6/132681404/medewesiposade.pdf
    • http://files.awolawayoflife.com/uploads/1/3/2/7/132711966/pijavalowofi.pdf
    • http://jibog.jesusascended.com/uploads/1/3/2/6/132682883/1660279.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/6563/8050/files/simplesmente_acontece_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7637/6983/files/osrs_dragon_boots.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/lagodi.pdf
    • https://cdn.shopify.com/s/files/1/0444/7987/3191/files/past_perfect_tense_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/3834/3322/files/jopelumasido.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/75205647252.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/38918833037.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/concrete_vs_asphalt_roads.pdf
    • https://cdn.shopify.com/s/files/1/0429/2830/8387/files/92928035910.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/xalimugut.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/19397347261.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/89432853824.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_off000067ac.bin
c746e8731440c4504318711f2d6987ce8cb73cb8c5b55782ece004a83da7580c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AC 4892 bytes
font_01_sfnt_off00007877.bin
90bff16dc9af4deeb2c6493f339d36b1a9636f8307abf087eb5710678d4d97e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7877 10248 bytes

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