Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f16739247005955…

MALICIOUS

PDF

38.7 KB Created: 2020-08-23 21:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ef1bf152e0ed27016e99a7b29865749 SHA-1: 55f981b5ad3eb92e83611599fde6311c2d3d6123 SHA-256: 0f167392470059554c7b2182b50cd29ab246860de938aeda9c205f1fb43bff3c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a service manual and the malicious URL, suggesting a lure to drive traffic to the redirector. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=ardo+carum+breast+pump+service+manual
    • http://files.restaurant.nomadsadventurequest.com/uploads/1/3/0/9/130969811/6078166.pdf
    • http://files.southernidaho.org/uploads/1/3/0/8/130813818/mekimup.pdf
    • http://lapudowu.100womenwhocaremedina.com/uploads/1/3/1/4/131436978/ac28d739658.pdf
    • http://files.hometownheritage.org/uploads/1/3/1/4/131453989/sutelakag-kuwekuparuwiti-kufunaxanejibut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1073/4755/files/mipilaxesonig.pdf
    • https://cdn.shopify.com/s/files/1/0441/2869/8520/files/dodgeball_a_true_underdog_story_cast.pdf
    • https://cdn.shopify.com/s/files/1/0438/3391/7590/files/nutritional_information_canned_black_eyed_peas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/arm_technical_training_course.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2315/files/angular_6_upload_file_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/3644/8667/files/89350489303.pdf
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/fin_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/zifurelanosodikabiti.pdf
    • https://cdn.shopify.com/s/files/1/0429/5193/4108/files/terapetujoridimogurumoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/sudefijerezujudivixo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/rilirofiwuvod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9377/files/46730271525.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000591e.bin
e88bcb334bed5b8517e1f89dccdce8467777ddf9ea5911c6d400aa6cbb01aa31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591E 5408 bytes
font_01_sfnt_off00006b62.bin
1526f4a57eca4a6e48735c6e59c7c863d1f64350d3530d4722b48776ae9f5770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B62 10128 bytes

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