Malicious PDF — malware analysis report

Static analysis result for SHA-256 f066036e15828213…

MALICIOUS

PDF

40.4 KB Created: 2020-07-09 21:38:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e58c51a81009884f12af0dd23871b395 SHA-1: 2d6adf068192893a4c207d44577364749fa57be7 SHA-256: f066036e15828213a98ab3493eb5c4fdaf63766923ebd4d6ea567e9af4f84d60
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to domains that appear to be part of a link farm. One critical heuristic firing indicates a direct link to a known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern is likely to lure users into clicking these links, leading them to malicious sites for phishing or further malware delivery.

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/wb?keyword=simple%20past%20tense%20list%20pdf
    • http://files.nightofthelivingdead-themusical.com/uploads/1/3/1/8/131857818/c0f02.pdf
    • http://files.millseatonpublic.com.au/uploads/1/3/1/3/131382406/fogufelaliwip.pdf
    • http://files.listenlikelearnmusic.com/uploads/1/3/0/9/130970014/dezux.pdf
    • http://files.hallingburychurches.co.uk/uploads/1/3/0/7/130776575/9771883.pdf
    • http://files.threecreekaussies.com/uploads/1/3/2/7/132710655/sujut.pdf
    • http://files.legacyhorselogging.com/uploads/1/3/1/6/131636990/rakofidi-tuxujojaxeki.pdf
    • http://files.sjspfaithformation.com/uploads/1/3/0/7/130739520/lituzodel.pdf
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.pdf
    • http://files.glennhousevr.com/uploads/1/3/0/9/130969235/8ece7e52b57c75.pdf
    • https://fanutuzak499104460.files.wordpress.com/2020/07/funovetenusamekozaj.pdf
    • https://nosabegu777062497.files.wordpress.com/2020/07/72873806628.pdf
    • https://rolabetupi.files.wordpress.com/2020/07/peboxovitunitezizuv.pdf
    • https://molinuwu.files.wordpress.com/2020/07/wugexumozusasesonexe.pdf
    • https://jamuximetuv.files.wordpress.com/2020/06/rulaf.pdf
    • https://bopametipez.files.wordpress.com/2020/06/46585894013.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/digalikerewuxajevukadud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44240048578.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87967576867.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000622e.bin
3f162ae1aa5672e301b6e695418d04b54396dee4af7206889ea32d4dc214586c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622E 4872 bytes
font_01_sfnt_off00007295.bin
4233687d710c7845eb2ea01ee6d20163b39af1e84a89905df9f753f0b69e5a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7295 10232 bytes

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