Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5850e0b53bbb3b9…

MALICIOUS

PDF

40.4 KB Created: 2020-08-31 13:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3db9360d5e8cc7a4ec129ee58e6b748e SHA-1: ddaefda6aa3125fab27f09e91607828b41392900 SHA-256: c5850e0b53bbb3b9ca5e5ca7bc2e6c7aaab3f065da762e673f12c5e0883e5328
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=active+passive+voice+sentences+pdf'. This URL is embedded within the document's body, disguised as a link to a PDF about grammar. The file also contains a PDF link farm heuristic, indicating a large number of external links, many of which point to benign content but serve to obscure the malicious redirector. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=active+passive+voice+sentences+pdf
    • https://static.usrfiles.com/ugd/d7ba0f_94915110b66149b097666fd5a44ebea6.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_157738ccea764cd784ffd13f1f7707f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2054b899cf84fc094ad39843c379632.pdf
    • https://static.usrfiles.com/ugd/b8c837_80aecbb1ed024a25a680bbeac7b79734.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd0ce4da3a354f04baf23d742bfe07a9.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/stanford_wong_professional_blackjack.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7808/files/fursuit_ref_sheet_maker.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/thomas_calculus_11th_edition_full_book_solution.pdf
    • https://cdn.shopify.com/s/files/1/0431/5722/5638/files/sap_ale_idoc_interview_questions_and.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/veterinary_microbiology_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/buku_bahasa_inggris_think_globally_act_locally.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/finiruruselovo.pdf
    • https://cdn.shopify.com/s/files/1/0465/4438/8246/files/50932678979.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_off0000606d.bin
7d9b37800ad662eed223066c492bddf672a1d9d98235c3beb23a13b7f3eaf1d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606D 5068 bytes
font_01_sfnt_off000071cd.bin
8546fc29df1072f1f5a93bf91edb5397a0a09b3b557b5eac022726bbc508122b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CD 10192 bytes

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