Malicious PDF — malware analysis report

Static analysis result for SHA-256 a78f7f5aa72b9130…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 00:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce604436bf14fcfeb76f74df921d6d2e SHA-1: b44bc1a0371443f00c77ca283854abcc5999c91e SHA-256: a78f7f5aa72b91302affe655ccd0ced805eb4c7f7f99118b821951185f3b0b1c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and a list of other PDF links, many hosted on cdn.shopify.com, suggesting a link farm or download lure. The ML classifier also strongly indicated maliciousness.

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=keynote+presentation+free+templates
    • http://karurin.delightthyself.com/uploads/1/3/2/6/132681579/6ed3d.pdf
    • http://files.dcpgsports.com/uploads/1/3/0/8/130815381/rilomunilavedil.pdf
    • https://cdn.shopify.com/s/files/1/0431/8448/8607/files/basic_sql_queries_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/45195013224.pdf
    • https://cdn.shopify.com/s/files/1/0435/0715/5110/files/47396192015.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevanedinuwisuvajolow.pdf
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/98023047385.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/46745743675.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/26642956355.pdf
    • https://cdn.shopify.com/s/files/1/0436/4743/4905/files/best_app_to_annotate_windows.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/candlestick_graph.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/9338365090.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_off000065a9.bin
5fce2cc98c9dd13f7938d4334f3f7f3ed2e924c06ca1e6359c8df86bad1a9170		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65A9 5120 bytes
font_01_sfnt_off00007708.bin
9ef161e5e01443dbf5aae77d39f9fc130fdab8d26a0ba4b73df8448abe355836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7708 10088 bytes

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