Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b0f43318a5dd7c…

MALICIOUS

PDF

64.1 KB Created: 2020-08-24 09:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a5706c155212b89ccaed68814849736 SHA-1: e4a2dcfe4192474c3df2cf47b3401f9c0b9143d7 SHA-256: f0b0f43318a5dd7c797bb059449e3605862d25148a3faf56ffd63951afd166ee
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One prominent link, 'https://ttraff.cc/pify?keyword=classifying+organisms+lab+28+answers', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other PDF links, suggesting a lure to download or access content, likely leading to further malicious sites. The presence of a 'download button' heuristic reinforces this interpretation.

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/pify?keyword=classifying+organisms+lab+28+answers
    • http://files.ankorsvolunteer.com/uploads/1/3/0/7/130739693/fazijisuwojam.pdf
    • http://files.myroamingspirit.me/uploads/1/3/0/8/130813888/josesoxudaw-zizeteduruk-mezagiveverapi-litotosisofox.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/7045748290.pdf
    • https://cdn.shopify.com/s/files/1/0435/8560/1695/files/wexarixav.pdf
    • https://cdn.shopify.com/s/files/1/0438/7058/4987/files/asme_codes_and_standards_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/the_quest_daniel_yergin.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/karen_carpenter_songs.pdf
    • https://cdn.shopify.com/s/files/1/0436/9973/2633/files/partnership_firm_accounts.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/zowevusurej.pdf
    • https://cdn.shopify.com/s/files/1/0439/4188/8155/files/dirifetotumed.pdf
    • https://cdn.shopify.com/s/files/1/0437/1798/4410/files/53796934180.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/mowiganitaxozugivi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/nikon_sb_600_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/68683790166.pdf
    • https://cdn.shopify.com/s/files/1/0433/9639/9269/files/medical_tourism_articles.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeac.bin
e74dae9266ab8618f61f220f294f7f508c3c6abe65c78e0c5b9103bbde441b74
pdf-font-stream PDF embedded font (sfnt) at offset 0xAEAC 5476 bytes
font_01_sfnt_off0000c143.bin
e2bcc5295beaf6ce7b47832fa198d22e2bdbfef8994f5ad6d062922e3d04dcc4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC143 10664 bytes
font_02_sfnt_off0000e549.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xE549 4324 bytes