Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c42cf02f5470e4…

MALICIOUS

PDF

47.9 KB Created: 2020-08-22 08:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0de7b7a5dbd63120f530094c314f45b SHA-1: dd56edb29e2fb2e7722d0a90458ea5acf9a94d1b SHA-256: c9c42cf02f5470e451ed561d38b3da1a732171e9d2858e07042d165d19a8cede
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. The document body, though partially corrupted, includes the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or content distribution strategy, though most of these specific Shopify links are marked as benign. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=large+window+envelope+address+template
    • http://files.maxcrider.com/uploads/1/3/0/7/130739651/9546e39183e.pdf
    • http://zosubumun.topdogue.com/uploads/1/3/1/6/131606289/8978514.pdf
    • http://lowiful.tamramccarthy.org/uploads/1/3/0/8/130814328/xilukedupopiwul.pdf
    • https://cdn.shopify.com/s/files/1/0437/5298/0641/files/48498643547.pdf
    • https://cdn.shopify.com/s/files/1/0436/4327/3369/files/piaggio_ape_spare_parts_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/51790174359.pdf
    • https://cdn.shopify.com/s/files/1/0434/2143/4005/files/81884805898.pdf
    • https://cdn.shopify.com/s/files/1/0439/5322/5883/files/not_falling_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/45001446098.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/37992235257.pdf
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/38538297889.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1469/files/lovuxoge.pdf
    • https://cdn.shopify.com/s/files/1/0440/1856/5270/files/mother_of_god_meme.pdf
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/minority_scholarship_application_form_online.pdf
    • https://cdn.shopify.com/s/files/1/0438/4240/4512/files/27233688262.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_off00007c9e.bin
6b501c094dfed3b59b92479588f4e87100828a410e449423c1be18055dce9924
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9E 5372 bytes
font_01_sfnt_off00008ee2.bin
f772e785416c3d3d3aa05a7f71c4bcb26cca1f827917d6c4daac5e88c724057d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE2 10472 bytes