Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd18ced599aaa478…

MALICIOUS

PDF

51.3 KB Created: 2020-08-18 15:01:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1d56f8167dc0546b289d01f53f9fd32 SHA-1: a4ebbcdec5e59938231b36d597ec282ef89ddf1a SHA-256: fd18ced599aaa478e25a15c0fcaa7f24f613f95d7bc683f92240a9655f38d375
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body includes text suggesting a 'download' lure, and the heuristic findings confirm the presence of a malicious redirector link and a link farm. The primary malicious IOC is the redirector URL.

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=arithmetic+math+questions+and+answers
    • http://files.smithfieldvawinebrewfest.com/uploads/1/3/0/7/130775978/3264519d.pdf
    • http://wujusaruw.umndisabilitybenefits.com/uploads/1/3/0/7/130775309/javadobuz_xuruk_busekozuvojemit.pdf
    • http://files.worksafehsesolutions.com/uploads/1/3/0/7/130739112/a92cff2.pdf
    • https://cdn.shopify.com/s/files/1/0443/3159/7980/files/mevogux.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2503/files/numamoxutezixasegedeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/holy_bible_revised_standard_version_catholic_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/87478889576.pdf
    • https://cdn.shopify.com/s/files/1/0437/6952/8471/files/88876346261.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/51877083176.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/ankylosing_spondylitis_physiotherapy.pdf
    • https://cdn.shopify.com/s/files/1/0434/7029/1096/files/antiphonarium_cento.pdf
    • https://cdn.shopify.com/s/files/1/0434/9558/8002/files/88683178195.pdf
    • https://cdn.shopify.com/s/files/1/0439/5502/8126/files/school_certificates_for_students.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/list_of_travel_agents_in_mumbai.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/
    • https://cdn.shopify.com/s/files/1/0432/6191/9396/files/5187708317

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073c0.bin
edcad857450fb370a7536e48ff30e40099bc8f404cdda8bcbaa0fe3e75204808
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C0 5352 bytes
font_01_sfnt_off000085d8.bin
8bd5b06bbcc4489166490e93e2b82d58bc8d84de4811445a4cb56cb953f9507a
pdf-font-stream PDF embedded font (sfnt) at offset 0x85D8 10284 bytes
font_02_sfnt_off0000a93d.bin
4972c892cf783310df7ebe7a43044f7b4e4d650808add06809858f2f0e6eeb09
pdf-font-stream PDF embedded font (sfnt) at offset 0xA93D 16448 bytes