Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72d77db9fd4531d…

MALICIOUS

PDF

39.8 KB Created: 2020-09-01 17:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95379b5481c2cdedfdc36677094e9500 SHA-1: ec80e631ac482e87cecabab512464d36b5d2bb03 SHA-256: a72d77db9fd4531d491cdfad044ab42f3eca20bca28c539904fe61b36f73e4f9
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware delivery. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of an SEO spam campaign to improve search engine ranking for malicious content. The embedded URL in the document body, 'https://ttraff.cc/wix?keyword=arabic+alphabet+free+printable+worksheets', is flagged as malicious, indicating a redirection to a harmful site.

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.cc/wix?keyword=arabic+alphabet+free+printable+worksheets
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/volovuferono.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0554/files/fuduresixofejebuderiti.pdf
    • https://cdn.shopify.com/s/files/1/0446/2919/6963/files/ice_cream.pdf
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/fofowoxepuvubumenosotez.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd07b4a2eac2446b842baa1a30769680.pdf
    • https://static.usrfiles.com/ugd/7f16bd_3f50f50fa7dd45338d934cdbad6f3b67.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d1c67659093413da620fc3c1c1b5d42.pdf
    • https://static.usrfiles.com/ugd/784815_6be87f3eb97d4c00bbaac60ce5bb58c3.pdf
    • https://static.usrfiles.com/ugd/67e251_3955d65fd4a7465bb93a95677fda1d92.pdf
    • https://cdn.shopify.com/s/files/1/0437/5045/7505/files/wamakidavobinejolitakuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/pulitoxidixobiwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0436/7079/8489/files/zewolokabo.pdf
    • https://cdn.shopify.com/s/files/1/0463/6042/8705/files/turbo_aow_engine_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/2587/2549/files/adventure_island_4_nes.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/pdf_audio_reader_software_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/kiit_b_tech_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/26187527201.pdf
    • https://cdn.shopify.com/s/files/1/0428/9118/2243/files/xuvexavokenuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/9067/1771/files/difference_between_alcoholic_and_nonalcoholic_beverages.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a31.bin
4b385c0224260041c27c630d00e99a958267acefc40078fcc7d16dba9ca42801		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A31 5388 bytes
font_01_sfnt_off00006c8e.bin
adf53b2fad55cdb5de28dd82b4e8889e49b1299fe231afc2dc0a095810fa0a41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8E 11304 bytes

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