Malicious PDF — malware analysis report

Static analysis result for SHA-256 d991af69fd10c02f…

MALICIOUS

PDF

62.2 KB Created: 2020-08-18 22:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82693b6c61aba72eeb40749ab7e11921 SHA-1: 737f442d592e1ca84574cd9c9aabe0a5d5274d06 SHA-256: d991af69fd10c02fd33b131d4f3866437fd1fbd773cfe62f1051ff0116be96aa
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body and embedded links also point to a URL that appears to be part of a link farm, specifically targeting 'ad blocker pc free'. This suggests a social engineering attempt to redirect users to a malicious site.

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=ad+blocker+pc+free
    • http://surad.berkleysteelers.net/uploads/1/3/2/6/132695471/pesamogugudowo_vezidasaduzi.pdf
    • http://rolug.graciayverdadmemphis.com/uploads/1/3/1/3/131398455/855c4bc10.pdf
    • http://files.mattkurdt.com/uploads/1/3/1/4/131407877/kesazukafole.pdf
    • https://cdn.shopify.com/s/files/1/0432/7204/4697/files/sizamagilulezamufux.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/carte_du_monde.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/cissp_book_2020.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/10873800611.pdf
    • https://cdn.shopify.com/s/files/1/0430/7864/7957/files/deconstructivism_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5502/files/16736175209.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2220/files/ionic_compounds_unit_6_worksheet_3.pdf
    • https://cdn.shopify.com/s/files/1/0447/4827/5863/files/lagu_balungan_kere_koplo_uyeshare.pdf
    • https://cdn.shopify.com/s/files/1/0448/0742/2109/files/listview_using_baseadapter_in_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/8525/0216/files/ketuwalutizetuvadadexis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/nowasobeneriwuvag.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/goxasesarabekexoperef.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/1/0431/0892/5600/fi

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b3a.bin
8501d59a5c51150a803dcab4ea30cd23f28b7bfc84f7f9d02f843d48c70287b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3A 4956 bytes
font_01_sfnt_off0000ac22.bin
79c77571585b5d01458127624ff4eae771204f868f1bcf05ab8a7bc7286d19af
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC22 10900 bytes
font_02_sfnt_off0000d15f.bin
f15c4a3a02a21542e78f8dc62721252e591d300a37b6a71781dea56b96efe480
pdf-font-stream PDF embedded font (sfnt) at offset 0xD15F 17444 bytes