Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf11a3cc2dccbd43…

MALICIOUS

PDF

51.2 KB Created: 2020-08-19 20:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9dc4f702bc5086b9c50d489389ed4f SHA-1: a60c1f9a1c0577d9fb8e5e9c0237e2762731b27b SHA-256: bf11a3cc2dccbd43f19aaf6f2cf1974712e2146c3a712e897cd41d9a7d1d4c64
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding a large number of external links. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=redhat+firewall-+cmd+cheat+sheet'. The document body, though heavily obfuscated, contains references to the same URL, suggesting it is the primary lure. The presence of numerous links, many pointing to unknown or potentially malicious domains, indicates a campaign to drive traffic to malicious infrastructure.

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.ru/pify?keyword=redhat+firewall-+cmd+cheat+sheet
    • http://puzege.phisigmapidavis.com/uploads/1/3/1/3/131379730/sujipijelenewurex.pdf
    • http://files.chefscommissarykitchen.com/uploads/1/3/1/4/131436991/wumejikuvovowi_volofiberiz_buzatevujijuv.pdf
    • http://files.wofcca.org/uploads/1/3/1/0/131070539/4ef47ada.pdf
    • http://files.walsh4one.com/uploads/1/3/2/6/132683292/luwisile.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9133/files/scratch_2._0_free_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8983/files/tinoxima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0430/8438/2357/files/show_box_app.pdf
    • https://cdn.shopify.com/s/files/1/0448/3658/5629/files/free_online_editor_delete_pages.pdf
    • https://cdn.shopify.com/s/files/1/0432/8046/6080/files/spider_man_ps4_trophy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6661/2130/files/trumpet_voluntary_piano_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0448/0227/7542/files/begokep.pdf
    • https://cdn.shopify.com/s/files/1/0437/5301/3409/files/hello_brother_telugu_audio_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6352/files/moluku.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/kenozonopidifudilapaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/4579/5493/files/rakedasek.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_off00006948.bin
c28624749896456d8b2670e0441aefcdf6c8d5eddfe047ee362a48bc59807d30
pdf-font-stream PDF embedded font (sfnt) at offset 0x6948 5392 bytes
font_01_sfnt_off00007b90.bin
0311a7ac9b59b5df3999920cf09c7929eaba5bc7e8ee2896791c111902651fb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B90 15120 bytes
font_02_sfnt_off0000ab02.bin
99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB02 16060 bytes