Malicious PDF — malware analysis report

Static analysis result for SHA-256 475a21b53589d9b2…

MALICIOUS

PDF

131.6 KB Created: 2020-07-22 06:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 157eae88f641c422896fbe41fddd46ef SHA-1: fbaad80cd5f45a34e95244dcfd99893ee2512e7a SHA-256: 475a21b53589d9b2fe5641686f3d0d4f3cd3b07c4adf3498633c7bd94ce54037
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure at 'ttraff.ru'. Another critical heuristic identified a PDF link farm, with the first URL pointing to 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The document body text, though heavily obfuscated, contains 'Ciencias naturales pdf 7', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=ciencias+naturales+pdf+7
    • http://files.creativestorageworks.ca/uploads/1/3/0/7/130740213/3769744.pdf
    • http://files.gardensatunityvillage.org/uploads/1/3/1/0/131071209/nolunapowazogos.pdf
    • http://files.m25initiative.net/uploads/1/3/1/4/131437702/rogitew-lemowel.pdf
    • http://files.design59.com/uploads/1/3/0/7/130774972/gulolunesomojavep.pdf
    • http://files.revomd.com/uploads/1/3/0/7/130775868/216dcf.pdf
    • https://cdn.shopify.com/s/files/1/0440/8469/1094/files/72735570441.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/mumexurizokidesodivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/fuxijoriwon.pdf
    • https://cdn.shopify.com/s/files/1/0430/6406/6209/files/pibojalovig.pdf
    • https://difomanonis.files.wordpress.com/2020/06/45906117542.pdf
    • https://wexosut.files.wordpress.com/2020/06/xusukenu.pdf
    • https://xuvabogov.files.wordpress.com/2020/06/18568406885.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/bigatedebujomupuxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2283/4071/files/tugowuwirafizenojipane.pdf
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/64317892553.pdf
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/nowiboganufiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/72715452159.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/34834156618.pdf
    • https://cdn.shopify.com/s/files/1/0437/6608/7838/files/48059267867.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/dowoxilonokazajabizinuf.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_off0001bb4e.bin
07f5737495ce26a11cb35778e8b5999413b8eaae9105c1be1ea3db8807046c57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB4E 5024 bytes
font_01_sfnt_off0001cc70.bin
6571c2099f3bf29533d004643be2d0e3c5fdbdc8a0fa4468486ce1dae60d40fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC70 16944 bytes

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