Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0fbe3b0a09cf2b…

MALICIOUS

PDF

41.2 KB Created: 2020-09-02 21:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f72202977dceecaaf8c53d10b012e877 SHA-1: d1c0cdeb083b475fdb311384de25030b3db334ea SHA-256: dd0fbe3b0a09cf2be00da842a3a66005fd60354831fd427a6c56778bba10e061
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=hotel+amenities+list+pdf'. This URL is presented within the document body, suggesting a social engineering lure. The PDF also contains a large number of embedded links to various PDF files hosted on Shopify, indicating a potential link farm or SEO poisoning tactic. 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.me/wix?keyword=hotel+amenities+list+pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5923/files/zepebawimekogeronuwu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3343/4011/files/archeage_leveling_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/fivexosojiratizuzeto.pdf
    • https://cdn.shopify.com/s/files/1/0429/7850/8953/files/57291221001.pdf
    • https://cdn.shopify.com/s/files/1/0431/5571/8298/files/34179995711.pdf
    • https://cdn.shopify.com/s/files/1/0465/2328/5662/files/hot_cross_buns_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0457/0261/1100/files/sizowisakinatuwidifupufag.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/ansel_adams_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6802/files/16835219890.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87277754858.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/nowamosonajabej.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/jotaburanubozuzuwawatudiv.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c31558bff1c4664b5282cef82c857d9.pdf
    • https://static.usrfiles.com/ugd/362633_c8f97e3dff2c4e7ca83fe2ad9064c1a3.pdf
    • https://static.usrfiles.com/ugd/0d9a50_d539e95a9f754587880400afe9f1bbd2.pdf
    • https://static.usrfiles.com/ugd/2f7815_2fee0193cde54d17b0cf3b9efaf927bf.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_off0000639d.bin
93a59d403dddc16d03771a8b72bdfde7c4c19f70130e9e14bc4be090eb5dac3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 5052 bytes
font_01_sfnt_off000074be.bin
4e00abcf8f8d17c7cd1ae62acd96a7ffb874c9dc30a6990aa3a3c6a1d26a32b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x74BE 10400 bytes