Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1d64144198f1d5…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 07:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f778dc52f2aa85ba87ceb5db3cd386a7 SHA-1: 65edd7980c82c02fa9a76e8a52b89eeb795f0f82 SHA-256: ef1d64144198f1d56791445f21afbc21fad1af11b87947517e0755a37e72b785
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one pointing to a known malicious redirector at `ttraff.com`. The document body, though partially corrupted, contains text related to a 'cessna caravan checklist pdf', suggesting a lure to disguise malicious links. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further indicates malicious intent, likely for phishing or malware distribution.

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=cessna%20caravan%20checklist%20pdf
    • http://wudez.nataliedownes.com/uploads/1/3/1/1/131164250/7724719.pdf
    • http://files.transparentturtlegraphics.com/uploads/1/3/0/7/130775822/kezodidumedif-mosivawamokari-vugivokokewe-bivige.pdf
    • http://paxuwex.makatiprimeproperties.com/uploads/1/3/0/7/130739553/e6e812.pdf
    • http://files.eringilbreth.net/uploads/1/3/1/4/131438611/vusafusabovavo.pdf
    • http://files.pureandsimplebible.com/uploads/1/3/1/4/131413550/radamexefefesamof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/capacitor_value.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/woridikosiganib.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0718/files/kales.pdf
    • https://cdn.shopify.com/s/files/1/0437/7985/0397/files/55090780672.pdf
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/64590779948.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5833/files/fiterepepukugijosowaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3996/files/75909842123.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/99119297308.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/pazutebaj.pdf
    • https://cdn.shopify.com/s/files/1/0439/8268/4318/files/21373661382.pdf
    • https://cdn.shopify.com/s/files/1/0437/7896/5656/files/pizoxoligomudef.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057b5.bin
b30866e97e47ffc32345fb23b6a2c1d102485caf8a85c90d362578088b7e0e29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57B5 5068 bytes
font_01_sfnt_off000068e2.bin
e6c1106caa8e49d89b12d5fe2b8ac09d4adf00bbe373ed70fc584de6dba88947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E2 10196 bytes
font_02_sfnt_off00008bcc.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCC 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.