Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7b9fa8137611a8…

MALICIOUS

PDF

50.0 KB Created: 2020-09-01 05:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1665b4a01266a7ddb858eb51cda4f1fb SHA-1: 7807dad7a81a7156d8927d2bd41fb904228e029c SHA-256: ca7b9fa8137611a84d862d4b54b033de0588f980d557de70753c219db356dc53
128 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, specifically pointing to 'https://ttraff.ru/wix?keyword=aceable+parent+taught+drivers+ed+answers'. This URL is presented within the document body, disguised as a call-to-action or download link. The PDF also exhibits characteristics of an SEO link farm, with numerous embedded links, further suggesting a malicious distribution or phishing attempt. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify the attack pattern.

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.
  • 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
  • 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=aceable+parent+taught+drivers+ed+answers
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zipepatijexozuzazes.pdf
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/pojuzimexobuxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8699/4855/files/rixiropoxubesid.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/gigemezubadebowamaz.pdf
    • https://static.usrfiles.com/ugd/217d68_d39a31d1eaca4f80baf05be944cb68ea.pdf
    • https://static.usrfiles.com/ugd/a91264_ffa087d721d242c4bbe9a942e667ed7f.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5194/files/negative_prefixes_advanced_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/signature_line_in_word.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2541/files/merriam_webster_visual_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4812/files/industrial_ergonomics_case_studies.pdf
    • https://cdn.shopify.com/s/files/1/0431/6548/3172/files/fomewatorimoputivif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0130/6526/files/tuditaxevax.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4658/files/67741211283.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/68590587054.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/
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/fil

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007041.bin
b035a900114604afde218fda9bba2aed313a1b1cd13cbb3bdcb84dc932e59ae8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7041 5616 bytes
font_01_sfnt_off00008353.bin
8e7943bcbb8d7a15ccb97d8f3b73b041cbd23dc4b9bf9981e06669507c72c5ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x8353 2764 bytes
font_02_sfnt_off00008f38.bin
6cc06000b3bac3a7c0915c8b7ab0df0bee8327837fa272427cc8459249bc7874
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F38 13448 bytes