Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedcf9e1bf0ffdb8…

MALICIOUS

PDF

43.6 KB Created: 2020-08-13 06:12:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 959f6ac6ebbe8b272372ba7c697bc34e SHA-1: 3827e0d853808f2a8a2d1764552dde979d4b45c9 SHA-256: eedcf9e1bf0ffdb85ce1fb7fab84df688a7be9175d5561975d0e3be34e77833d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'small pdf merge images' and includes the primary malicious URL. This suggests a social engineering attack aiming to trick users into visiting a malicious site under the guise of a utility. No scripts were extracted, limiting the analysis of further payload delivery mechanisms.

Heuristics 3

  • 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.
  • 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.com/pify?keyword=small+pdf+merge+images
    • http://mobixebo.clclockport.org/uploads/1/3/1/4/131438175/vepowufixa_zemisupukarati_purevo.pdf
    • http://files.destinyinthedetails.com/uploads/1/3/1/0/131070231/zetozulolar.pdf
    • http://files.sfxfaithformation.org/uploads/1/3/1/3/131379439/31ea7.pdf
    • http://ruvidezem.southernhillsbiblechurch.org/uploads/1/3/0/7/130775904/87e367d4d7143.pdf
    • http://files.varsity-prep.com/uploads/1/3/1/3/131398322/wegasup_famawol_nojofaninudefas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0012/6880/files/vafotizojixedu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tugerivedisabuv.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2377/files/misofekuvafa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/52012610943.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/70604601740.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/visatanikisakurusita.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/cheat_engine._6._1.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/baja_autoestima_tesis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0190/5315/files/ribejolomubegemexesav.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/amadis_de_gaula_libro_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/81530391861.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1070/files/38657841051.pdf
    • https://cdn.shopify.com/s/files/1/0434/0590/1991/files/natufivegadojav.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_off00005f39.bin
dc14475fc894fcccf96f3197a3ae1c3388677847ec897a2fb706b302bbd8439d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F39 4956 bytes
font_01_sfnt_off00007008.bin
a5746a64f4ff1f722710a97cb7b6de3f3072c2cee513b7f832b025b09dd5f3ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7008 10080 bytes
font_02_sfnt_off000092af.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x92AF 4324 bytes