Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c779075c3656d95…

MALICIOUS

PDF

33.4 KB Created: 2020-08-21 17:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 185bde4b859eb3f7404ed776ec50c73c SHA-1: deeece941678b1240167a67e46f316dcdbbc1d4c SHA-256: 5c779075c3656d9562f130251eb60a2cf056404bc1b7ba3ef8f120784e741a4e
154 Risk Score

Malware Insights

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

This PDF document contains a link to a known malicious redirector, ttraff.cc, which is likely used to host further malicious content or phishing pages. The document also exhibits characteristics of a link farm, embedding numerous links to other PDFs, likely for SEO manipulation or to obscure the malicious destination. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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.cc/pify?keyword=adverbial+phrase+worksheet+ks2
    • http://files.vikingsoul.net/uploads/1/3/2/6/132682883/5552050.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0127/3760/files/biology_booklet.pdf
    • https://cdn.shopify.com/s/files/1/0456/8498/1919/files/bhutan_visa_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/54087120235.pdf
    • https://cdn.shopify.com/s/files/1/0435/7750/7999/files/wimezozebofed.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xakikalimakimoxe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2273/7830/files/12078427401.pdf
    • https://cdn.shopify.com/s/files/1/0450/2516/5470/files/tosabexerofij.pdf
    • https://cdn.shopify.com/s/files/1/0432/5975/6708/files/tidisuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/9209/0784/files/buberodigefowalukevuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/vitogenafavaninunixap.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/garekivuzenederopul.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_off0000460f.bin
f6c7b679b0e6a7420ecae8ff12e70433e92b91dec683fa578016f3beec6458b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x460F 5524 bytes
font_01_sfnt_off000058de.bin
ba4d1bc893f91d137ce2356b9d8b1a7b8fae52ae40d96a8aeec0c5d266901776
pdf-font-stream PDF embedded font (sfnt) at offset 0x58DE 9416 bytes