Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17e0f0159c882d0…

MALICIOUS

PDF

46.3 KB Created: 2020-08-30 15:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c857020dfd85441bf68b29e6badcbb6 SHA-1: 6c0722028676cedcc019de57a451eeccce2fdc40 SHA-256: d17e0f0159c882d08442bd36d003d8fc80b34a3a58b0a991b89a480bf9fd8003
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to its extensive use of external links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=yaesu+ft+990+mods'. The document body, though heavily obfuscated, also contains this URL and references to other PDFs hosted on static.usrfiles.com. This indicates a likely attack pattern involving a link farm to distribute malicious content or conduct phishing.

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/wix?keyword=yaesu+ft+990+mods
    • https://static.usrfiles.com/ugd/4b68be_2bda137a8fc84fc88b74ab6afc06a83e.pdf
    • https://static.usrfiles.com/ugd/be19e1_41ea54d7fb8d42389395a6e58136fa7a.pdf
    • https://static.usrfiles.com/ugd/76156b_03e404b3431a469db55fd6889544b868.pdf
    • https://static.usrfiles.com/ugd/de02f3_484c82219c094daa81fad34978cf2e85.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3040/files/o_reilly_learning_python.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3834/files/71098080269.pdf
    • https://cdn.shopify.com/s/files/1/0466/4095/5557/files/w3schools_html5_website_templates.pdf
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/44835818496.pdf
    • https://cdn.shopify.com/s/files/1/0434/5649/5769/files/dajenupafobalegen.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/mafifosojadusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/tawid.pdf
    • https://cdn.shopify.com/s/files/1/0434/0596/7527/files/24799351573.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/texivirupasumo.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/historicismo_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0459/8684/0743/files/bad_boy_buggy_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/ecology_and_environment_pd_sharma_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4861/5579/files/62507273330.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_off00006b05.bin
87ac5ac9ef969fc7f100613648f1b20009d25337c3ea8fce1cc16ba998ccef92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B05 5184 bytes
font_01_sfnt_off00007c8b.bin
d3a45b92b95ff37ad53d9a900f30cabe75ddc8b3505ed68cc06c3468fca56998		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C8B 14792 bytes

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