Malicious PDF — malware analysis report

Static analysis result for SHA-256 9944a5b6b13b170c…

MALICIOUS

PDF

43.5 KB Created: 2020-09-07 06:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c0305c6a707e31a658a1ea30cff2495 SHA-1: 52f6ead3b8d584a3ebc1ae474838898fd0f7c278 SHA-256: 9944a5b6b13b170ca21a74cbdb2838be000a7b4716fb23135cecef0d3a7b4e97
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/pify?keyword=cavidades+del+cuerpo+pdf'. Additionally, it exhibits a PDF link farm behavior, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML classifier strongly flagged this PDF as malicious.

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.link/pify?keyword=cavidades+del+cuerpo+pdf
    • https://static.usrfiles.com/ugd/576447_41c132dae1454ac58bb83fa35f51b550.pdf
    • https://static.usrfiles.com/ugd/dcc11b_4b54c3dab93c43e9847e42528d7eacaf.pdf
    • https://static.usrfiles.com/ugd/fe83c3_bc754ec617ee4bea847badb63b07576b.pdf
    • https://static.usrfiles.com/ugd/b972d5_289aba5c297742269b75f6d7bf356d0c.pdf
    • https://static.usrfiles.com/ugd/912de2_f07b4fc032824460ad8c55b659ce0fc0.pdf
    • https://cdn.shopify.com/s/files/1/0432/6146/0644/files/battle_for_middle_earth_steam.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/dark_cloud_2_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/business_communication_today_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/zosivewufepaxejizano.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/itunes_for_android_box.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/96766218622.pdf
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/norapog.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0321/files/solomon_asch_conformity_experiment_hypothesis.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/
    • https://cdn.shopify.com/s/files/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000699b.bin
6dd0fb51dca49497c8ea4d7764f3876d1603a5a19cfbc88b64a66ccb76f292f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x699B 5116 bytes
font_01_sfnt_off00007b16.bin
ec6be04b7cdb2bab513be3463fd8f370eaa485e7d9b74bffe0eb746618648a47
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B16 11668 bytes