Malicious PDF — malware analysis report

Static analysis result for SHA-256 1435ab534e0fb80b…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 22:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 492276f9da600105ab6ca0bb3f4c5d1a SHA-1: 6dcabd1b8e2acd94301e7778018761cc92910cfe SHA-256: 1435ab534e0fb80bb94535c71a0a94799ccd86b7ac44f6dfb9737ff55377a7d2
154 Risk Score

Malware Insights

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

The PDF contains a lure related to a ski resort snow report, but the embedded content and heuristics indicate malicious intent. It links to a known malicious redirector, ttraff.cc, which likely serves as a gateway to further malicious content. The presence of numerous external PDF links suggests a link farm or redirection strategy. No scripts were extracted, but the PDF structure and malicious URL are strong indicators of a phishing or malware distribution attempt.

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.cc/pify?keyword=kicking+horse+ski+resort+snow+report
    • http://runuza.standrewspaisley.com/uploads/1/3/0/8/130814124/nowarifikigapusore.pdf
    • http://vobab.bulbsoup.com/uploads/1/3/1/6/131636665/pogif.pdf
    • http://files.woodbridgelimo.org/uploads/1/3/0/9/130969966/5934810.pdf
    • http://files.labrescue.com.au/uploads/1/3/0/8/130874474/1829574.pdf
    • http://files.editingdonewrite.com/uploads/1/3/0/7/130775639/8073120.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0463/1199/7605/files/refonitajax.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7250/files/69888282124.pdf
    • https://cdn.shopify.com/s/files/1/0433/1316/8542/files/gaxexa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/24744367994.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/past_simple_and_past_continuous_activity.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/39117892188.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5760/files/le_spleen_de_paris_analyse.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/87614224821.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000586f.bin
bcb82485b1bbd13ee805de05382d267762e59a5fbc3059217d03f1e947f69f59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x586F 4868 bytes
font_01_sfnt_off000068fa.bin
596a4cc9fbf60eaf32e8e926d5a4011032f16074792c1b0724436699bae0fcf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FA 10172 bytes
font_02_sfnt_off00008bd5.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD5 4324 bytes

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