Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4e7601ab0dd6aa…

MALICIOUS

PDF

48.7 KB Created: 2020-08-07 04:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d8ab2fbee015e9d8a3e11f725cc7cb0 SHA-1: d72fbe1311b7d190564b6d9599c8219e3f6b3579 SHA-256: ef4e7601ab0dd6aa11b6134ffd4872560b9b42a8816117ace8417e989fc46e0a
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lure users to malicious content. The document body, though heavily obfuscated, contains text related to 'school building plan' and the malicious URL, suggesting a social engineering pretext. The presence of a visual download button further supports this lure. 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.ru/wb?keyword=school%20building%20plan%20section%20elevation%20pdf
    • http://gizijisig.christianjessup.com/uploads/1/3/0/7/130738666/vopepuratijoxuz.pdf
    • http://files.julietteyoga.org/uploads/1/3/2/6/132681316/7414463.pdf
    • http://files.funktionalglassworks.com/uploads/1/3/1/4/131406295/31c9ef.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/52832217.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1716/files/negukaninodajenigak.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/sokojurukagobesozedilorof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/vilufupuleb.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/xozofaked.pdf
    • https://cdn.shopify.com/s/files/1/0431/1272/6677/files/tigugagatewatetike.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/pantone_formula_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/udp_tracker_istole_it_80_announce.pdf
    • https://cdn.shopify.com/s/files/1/0435/7337/9231/files/workout_plans_to_lose_weight.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/29720933625.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_off000072d9.bin
c8bf0f38f7c10cdec463e83055461c366e5e03438cab1d092db5ecb7c5f06fc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D9 5508 bytes
font_01_sfnt_off00008587.bin
59c446b9b084b453b9c30504b445a34da461609e0c53a4b93ffcfb5cf7bd2524
pdf-font-stream PDF embedded font (sfnt) at offset 0x8587 10064 bytes
font_02_sfnt_off0000a7f3.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F3 4324 bytes