Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d4b423dc5ff34e…

MALICIOUS

PDF

44.8 KB Created: 2020-08-14 00:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7761a37deb68827ef909bb58f26b2e25 SHA-1: bedf4fbcecc5c8766a2a64fe75b3ec8e0bff4e6b SHA-256: 25d4b423dc5ff34e4b01b9116d3439b9f6188c3fab3a5820ca93bacca1ab0794
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify domains but one critical link to a known malicious redirector. The presence of a 'download button' heuristic further supports the lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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=bacula+server+linux
    • http://files.yardmanpress.com/uploads/1/3/1/3/131398374/9751238.pdf
    • http://files.hsccmilwaukee.com/uploads/1/3/0/8/130813715/kapafoxunesozuf.pdf
    • http://files.sleepingbeeathome.com/uploads/1/3/0/8/130814682/3567921.pdf
    • http://files.fibrocysticbreastnaturalhealth.com/uploads/1/3/0/9/130968943/gakuv.pdf
    • http://files.12stepstolovingtheself.com/uploads/1/3/1/6/131637679/vedubezadozu-zogizunosizap-guvinafevopas-pozusewuzusetu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/mulobafod.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/topofatufipegakupok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/savegubi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/41962396499.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/60807374902.pdf
    • https://cdn.shopify.com/s/files/1/0434/5570/9341/files/pitotewupelovogeje.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/83452054873.pdf
    • https://cdn.shopify.com/s/files/1/0435/1043/1896/files/radaminozarav.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7450/files/8x12_lean_to_shed_plans.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/italian_stories_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/pasonokubezaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5268/files/35991706599.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/cs_lewis_short_stories.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_off00007189.bin
4d212aa27eff95a3b56631a55f8d56cea0ecfc3f3455c311364e45bfc9753b64
pdf-font-stream PDF embedded font (sfnt) at offset 0x7189 4968 bytes
font_01_sfnt_off0000827c.bin
4fb4830d294fb03951b5144ede5db83e7287330c4e48a8ac984707a7cd013965
pdf-font-stream PDF embedded font (sfnt) at offset 0x827C 10520 bytes