Malicious PDF — malware analysis report

Static analysis result for SHA-256 93bbf8fd8c96cae4…

MALICIOUS

PDF

44.3 KB Created: 2020-08-18 17:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eecde493cb87bdfafcefb1fbe0836fc0 SHA-1: 65636294e468318384ed5bbfa908c2494caf6d10 SHA-256: 93bbf8fd8c96cae44641b0a789d876ddb2a56b070bf6b5215361edeaa87eed27
130 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The presence of a visual download button and the document body text mentioning 'Accession register format in library' suggests a lure to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content.

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=accession+register+format+in+library
    • http://files.thesoundingboardministry.com/uploads/1/3/1/3/131380107/wivotox.pdf
    • http://files.yt8music.com/uploads/1/3/1/4/131453005/ae92acb9c.pdf
    • http://files.laneinspections.com/uploads/1/3/1/3/131383959/2766878.pdf
    • https://cdn.shopify.com/s/files/1/0447/8484/4949/files/25125419379.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5195/files/wonderlic_personnel_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/devufarugasinokolokekeban.pdf
    • https://cdn.shopify.com/s/files/1/0429/9191/1066/files/antagonistas_receptores_h2.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0933/files/68272286652.pdf
    • https://cdn.shopify.com/s/files/1/0430/4669/9165/files/aha_acls_algorithms.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8342/files/resmed_airsense_10_autoset_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/21045800068.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/wapilemozezewamuputulexop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5798/files/13612212400.pdf
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/female_body_language_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/80802617450.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_off00006eff.bin
2b67885b3ca6dc59e0e54e5ae028e938470de0e58ffec2159c2e23bed82b4562
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFF 5432 bytes
font_01_sfnt_off0000815e.bin
0f3dc2a5210a3299434150bc9fbbe3f7502e7d895ebefc5caca6e492a324d27b
pdf-font-stream PDF embedded font (sfnt) at offset 0x815E 10076 bytes