Malicious PDF — malware analysis report

Static analysis result for SHA-256 d328a65c6a2bad60…

MALICIOUS

PDF

52.1 KB Created: 2020-09-17 09:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a852142b3a370d034b490ea991b52a5 SHA-1: d53cd25f6d481550ce6244ed515e3bbc7649e290 SHA-256: d328a65c6a2bad606a94a237e7617f0a977b8309b6dfaa1bb1bec9d45e69d6ff
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The document body text, while partially corrupted, includes a URL that appears to be a lure for job seekers. The primary heuristic firings indicate that the PDF is a malicious redirector and part of a link farm, strongly suggesting its purpose is to direct users to malicious sites.

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.club/wix?keyword=dental+assistant+or+medical+assistant+yahoo+answers
    • http://files.theincomesnowball.com/uploads/1/3/1/0/131069978/dff3073e48.pdf
    • http://files.fbtvmin.net/uploads/1/3/2/3/132302710/nutivanugejeruwota.pdf
    • http://fovigebo.perrysburgorchestras.org/uploads/1/3/1/8/131871768/zedubelevikixo_pefuse_nujexogepiv.pdf
    • http://files.vanderlegal.com/uploads/1/3/1/0/131070051/51ec66c4e2eca6.pdf
    • http://files.changingoutcomes.co.uk/uploads/1/3/1/6/131636651/684758.pdf
    • http://files.hrv4biofeedback.com/uploads/1/3/0/7/130739214/xesiranepos.pdf
    • http://jumiril.ryanstander.com/uploads/1/3/1/6/131606260/a45055db6.pdf
    • http://jupodaj.massbuyinggroup.com/uploads/1/3/0/8/130873982/jifibiboge.pdf
    • https://e8f28e8e-5de4-49dc-bf6b-49f2a92aeddb.filesusr.com/ugd/66f3f9_f3644194481045ec8e28026f4236e148.pdf?index=true
    • https://2f99e3ca-9082-4cc8-9f8d-f11b77f20908.filesusr.com/ugd/02beb7_a96640e34cac49bfbcbc208aeb2a56db.pdf?index=true
    • https://78f1e30d-f8e9-4f07-90ce-3f19c802323a.filesusr.com/ugd/2c7c49_be1c6e01145c42dcb3ad2be65c5cad15.pdf?index=true
    • https://1df39fdd-f20f-4df7-9aee-a3eab8634e0f.filesusr.com/ugd/6116da_d1ff34cf5007428eb2e9e749e9fed8e5.pdf?index=true
    • https://ce2d09bb-8179-44c9-ac88-fad2b88d9e05.filesusr.com/ugd/b5472a_3c57baf655754849bdfb89cee2017112.pdf?index=true
    • https://e7f43485-d3df-4c1e-82bd-c726941ee8db.filesusr.com/ugd/74e905_ff5b23aaa9a24c149d0f83d206ddbb7d.pdf?index=true
    • https://8d96b0b1-f2ef-42ac-8726-da0a9cec58c3.filesusr.com/ugd/5e81b9_1e1ba695d76546519f0a8b865084f882.pdf?index=true
    • https://849fb23c-291e-4beb-93b5-da7e1f75f050.filesusr.com/ugd/1d64af_164b24173ec2418abfaebd19c3b9fc58.pdf?index=true
    • 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_off00007e89.bin
53e932d8cb25712867b016cb4a9dc9dd1824c466ee47b700ca6f56b8cf5a61a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E89 5160 bytes
font_01_sfnt_off00008ff7.bin
86812994d74d69fb647d124ade6e9cd8be0dc163c96fb43685d1368efb4edc50
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF7 10604 bytes
font_02_sfnt_off0000b432.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB432 4324 bytes