Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fdb7dfb9415210…

MALICIOUS

PDF

36.0 KB Created: 2020-08-25 13:40:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51885b93b68fb6a4104d3cd645237449 SHA-1: c620036e42b8de1ebb7e70d3f3bc9af23c12b5e1 SHA-256: 60fdb7dfb94152100a3ffd2620a3d2a08f08a80727480cd26a628bb1fcf8af7c
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, indicating an attempt to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the embedded URL is the primary indicator 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=bosch+maxx+5+silence+perfect+manual
    • http://files.etagerellc.com/uploads/1/3/1/4/131483249/gikejozifijedade.pdf
    • http://files.sjmsperformingarts.com/uploads/1/3/0/8/130813135/ad6ca32386aa28.pdf
    • http://files.hanoverteachers.com/uploads/1/3/2/7/132740488/zewuvotole-mosutadenovu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0466/2765/1749/files/semeronuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/wizorun.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/tuxuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/seleruribonefilipaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0546/8068/files/66091807347.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/religofuna.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/too_many_items_1._14.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/fafetidi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0718/0954/files/84340162386.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43181801848.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_off00004e00.bin
d20a93931e91189bdb1d574303d4bde586b6ad2fec222de070b99cf4a87d5349
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E00 5496 bytes
font_01_sfnt_off00006086.bin
a6e74ee79bce68e6352a9f3366637e1541f27b6eb719aed5cbfa5f9a415b0f84
pdf-font-stream PDF embedded font (sfnt) at offset 0x6086 10208 bytes