Malicious PDF — malware analysis report

Static analysis result for SHA-256 f26f419fd3739643…

MALICIOUS

PDF

33.7 KB Created: 2020-08-21 17:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f58a54b969e4e0b5ec9daab69df8cdc1 SHA-1: 0b0e3917e053b4a638d2f48bebbd85325bfd367d SHA-256: f26f419fd3739643bf6756b81462e15fd9b0d06472b9f6636296693e08e9a066
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains text related to 'backgrounds for adobe photoshop' and a URL that appears to be part of a link farm designed to manipulate search engine results. The primary malicious URL identified is https://ttraff.cc/pify?keyword=backgrounds+for+adobe+photoshop+7.+0+free, which redirects to other content.

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=backgrounds+for+adobe+photoshop+7.+0+free
    • http://pijitepa.the8blockfitnessstudio.com/uploads/1/3/1/6/131637021/1196684.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/74953123935.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/43263847987.pdf
    • https://cdn.shopify.com/s/files/1/0432/5064/7202/files/big_ideas_math_algebra_2_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/8716/6628/files/keboliratupeforumajo.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/averages_and_range_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6305/files/drake_all_me_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6126/4035/files/raid_shadow_legends_mod_apk_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/0379/7916/files/canoe_kayak_magazine.pdf
    • https://cdn.shopify.com/s/files/1/0432/2613/6743/files/radicales_libres_en_alimentos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0429/2411/4076/files/21340873389.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/volobufepafolosovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9747/3699/files/sowipowelavos.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_off0000452d.bin
f280887453c3e144b60d98dbab8757d7d8013065cadff381b1558531c83a3c87
pdf-font-stream PDF embedded font (sfnt) at offset 0x452D 5892 bytes
font_01_sfnt_off00005938.bin
8862e3db2a9369fb6eafdadb70eb133b9070e1a80ccb0d7199820b4a3f57fa6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5938 9580 bytes