Malicious PDF — malware analysis report

Static analysis result for SHA-256 8343598f1af1351c…

MALICIOUS

PDF

45.0 KB Created: 2020-08-31 05:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b8c9b6825ab43dd719abe22e8a36ddb SHA-1: 7505a4b4073d1b6f25b3095226bc1cae0ad624fc SHA-256: 8343598f1af1351c07bf97d53e8d094a55b0f365ba39ccff989327b482b1209c
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign Shopify links, but the primary redirector is suspicious. The presence of a 'download button' lure further supports a phishing or redirection attack pattern. No scripts were extracted, but the overall structure and the malicious URL indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=n10-+007+exam+objectives
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9967/5041/files/bioshock_rapture_ehri.pdf
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/angulos_entre_paralelas_y_una_secante.pdf
    • https://cdn.shopify.com/s/files/1/0462/8722/4993/files/79524732543.pdf
    • https://static.usrfiles.com/ugd/9ea91e_804fb420d9e5406fadd039a6694fe309.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/gaxujinopip.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/kobefulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/gisoduzogolokedasizosugo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/java_sort_string.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3429/files/5088437911.pdf
    • https://static.usrfiles.com/ugd/a59130_be8c768cdd454c719b2bc167faabd1c6.pdf
    • https://static.usrfiles.com/ugd/003b86_ece3a384c96b48d4be74b44fa15b5e06.pdf
    • https://static.usrfiles.com/ugd/b8c837_0700a533236345458e12373462f05a7b.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_off00007218.bin
4e7b09e733d40670230be0f01d9adecd1a3c62bfe10d76f9fee6dd689cd2ea52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7218 5436 bytes
font_01_sfnt_off000084ae.bin
689cd9629cfd10c771d8365178cc0c0af51135a71099dc1cd6ddfe25ded6a707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84AE 10256 bytes

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