Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d449e5e7f07de42…

MALICIOUS

PDF

41.0 KB Created: 2020-08-25 13:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da9a0ba5f0ae0c4fc45dfdcda1ef9346 SHA-1: f18487664d0409fc294bb5c0f5105ecb9b7afcc7 SHA-256: 4d449e5e7f07de425931040dca6bac73ecf84f2d856a42423a457bf1b721ab18
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a high number of embedded links, many pointing to Shopify domains which are likely used to host further malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body contains garbled text and a reference to the redirector URL, suggesting it's a lure.

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=georgia+guidestones+cube
    • http://files.nitrofoundation.com/uploads/1/3/2/6/132695746/3523943.pdf
    • http://voxefo.locomotionpress.com/uploads/1/3/0/7/130738970/gupovepexax_sagibid_vivixetasu_jupapibaxunere.pdf
    • http://files.ntbdesign.com/uploads/1/3/1/1/131163914/e00209.pdf
    • http://files.smartfirstaidcprtraining.com/uploads/1/3/1/3/131384249/545921.pdf
    • https://cdn.shopify.com/s/files/1/0431/1954/2434/files/66260897641.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/53046997691.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/image_to_word_converter_small.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/video_editor_for_android_no_watermark.pdf
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/steam_table_calculator_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/57713573989.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0021/files/57462051909.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/poxusulijupidokubeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/5042/6787/files/pajikigiwuduburuvek.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_off00006371.bin
4bf01d9534db0d597456b31ad97b9ebc2be4b4a75d2aa28fa2477f2c57e6ca94
pdf-font-stream PDF embedded font (sfnt) at offset 0x6371 5244 bytes
font_01_sfnt_off00007557.bin
feaf986255909a70c580275baf7a3438917091d0b94b32f7105ed6e4ddfbef68
pdf-font-stream PDF embedded font (sfnt) at offset 0x7557 10052 bytes