Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f23b750665a77e…

MALICIOUS

PDF

42.0 KB Created: 2020-08-28 10:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61c324691b0319f3dc562dbe8085e363 SHA-1: 58d8d7a787c193f2fba01503a1cf929666b1ddee SHA-256: d5f23b750665a77e98d5bc9d7a96c5d76007e1fb9675bb60330eabf73705f800
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, with one identified as a malicious redirector. The heuristic firings indicate that the document is designed as a link farm, likely to distribute malicious content or facilitate phishing attacks. The primary malicious IOC is the redirector URL.

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=puntos+que+dividen+segmentos
    • http://files.heartcentredhealing.org/uploads/1/3/1/1/131164012/944e5.pdf
    • http://files.nhscienceforcitizens.org/uploads/1/3/1/0/131070561/bevik.pdf
    • http://files.doorwaytodignityabuserecovery.com/uploads/1/3/1/8/131856852/piloja_zudotedu.pdf
    • http://janezix.jillhakala.com/uploads/1/3/1/0/131069934/82bedcb49567e.pdf
    • http://tawano.freechristianebooks.org/uploads/1/3/2/8/132816202/890d213dbaeb34.pdf
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/d2_point_group.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/bacterial_conjunctivitis_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0444/4202/6150/files/selection_sort_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0433/6825/1548/files/70305665976.pdf
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/vataguwabopofepis.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/badminton_rules_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/6120/5399/files/act_setup_ff14.pdf
    • https://cdn.shopify.com/s/files/1/0432/7306/0520/files/t9_android_tv_box_review.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/essentials_of_human_anatomy_and_physiology_10th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0526/files/godfather_theme_accordion_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/7066/0508/files/44967364866.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/kapewawere.pdf
    • https://cdn.shopify.com/s/files/1/0433/6546/6270/files/university_of_pennsylvania_endowment.pdf
    • https://cdn.shopify.com/s/files/1/0433/8837/1107/files/vituwilobubifefos.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/clasificacion_de_tornillos_y_tuercas.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/1/0433/6546/6270/files/un

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ff.bin
bfe4a2820aada27aee6e3f565f6e0bf9d8d3ad3e86be131f10d8c2a7d378dd27
pdf-font-stream PDF embedded font (sfnt) at offset 0x64FF 4996 bytes
font_01_sfnt_off000075eb.bin
4bf6f33ad23f8612cc00cd3bfae0101225ff7d2df27d14c9b29848e65c28631e
pdf-font-stream PDF embedded font (sfnt) at offset 0x75EB 10964 bytes