Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e88fe9b9d164a4…

MALICIOUS

PDF

43.0 KB Created: 2020-08-18 13:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50f6a4af91cd1ae29300b0ce1aed8735 SHA-1: b5e64ea842d2ffca8c4c7bd3774ef5af5ca1d675 SHA-256: 09e88fe9b9d164a49f055b5cf17dd5ee7df2f63b487dd83cfe684f425a70ccc7
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=lancair+lx7+performance'. It also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify URLs, reinforcing the lure. No scripts were extracted, but the presence of embedded URLs and the redirector heuristic strongly suggest an attempt to lead the user to malicious infrastructure.

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=lancair+lx7+performance
    • http://zasetuda.sayurihayakawa.com/uploads/1/3/0/8/130814328/9233839.pdf
    • http://jujotozon.townofharmony.org/uploads/1/3/0/7/130775654/fae4e5287e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/18988986069.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/chemistry_notes_for_competitive_exams.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/1718001353.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/navy_periodic_health_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0430/7379/8298/files/funiledakum.pdf
    • https://cdn.shopify.com/s/files/1/0449/8151/8494/files/les_miserables_abridged_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/76800633553.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/85246766275.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/navy_nonresident_training_course.pdf
    • https://cdn.shopify.com/s/files/1/0448/7417/0535/files/afro_house_instrumental_beats.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/zezezuwevafiwom.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/zasaduwazowofatevewizem.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_off00005be3.bin
18d9458a92a03e972675c485fd6ea765ba9c04d01620ce5096be2c997f786dca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE3 4780 bytes
font_01_sfnt_off00006c06.bin
b107fafa77ebb1b317e5187ebdde63fef4fd81df0ff25e34902860b22746496c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C06 11000 bytes
font_02_sfnt_off00009146.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9146 4324 bytes

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