Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4febf1d80b1af5…

MALICIOUS

PDF

57.4 KB Created: 2020-08-23 04:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0df416ec7d349e4e9a313ff269ecbdc SHA-1: 381d04daeb57366cec605f736ca3089aaaa19005 SHA-256: 1e4febf1d80b1af5c7763f7083c8733f8d01e6aa0019f33589ceaec0d4eb2134
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector link pointing to 'ttraff.cc'. Another critical heuristic flags it as a PDF link farm, with 20 external PDF links, many hosted on cdn.shopify.com. The ML classifier strongly indicates maliciousness. The primary attack pattern appears to be SEO manipulation or distribution of further malicious content via a link farm, with the 'ttraff.cc' URL being a key indicator 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=sample+flyer+templates+free
    • http://files.diegobardonephotographer.com/uploads/1/3/1/3/131383283/5748514.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/72996320280.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4706/files/zebeguzoviwomimufe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/xewigonepuzamevibebowag.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/pazepesukavov.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/gixivoninemifivebexuka.pdf
    • https://cdn.shopify.com/s/files/1/0429/0550/1859/files/mixed_fractions_worksheets_for_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/3579310487.pdf
    • https://cdn.shopify.com/s/files/1/0440/9848/6424/files/fofibidifo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1991/0820/files/poweguloviwegiridagupen.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ea3.bin
ed9a99bb35095a4c3d429c5ea3b31c55702542e32efbd7dc82c6c71da186fdb7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA3 5252 bytes
font_01_sfnt_off0000a078.bin
ac76fdd881614d1507f94973537de35d14c752569c01945c95e5a92f39532944
pdf-font-stream PDF embedded font (sfnt) at offset 0xA078 10588 bytes
font_02_sfnt_off0000c4a6.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A6 16036 bytes