Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a5cb3c4f6d9d84…

MALICIOUS

PDF

41.8 KB Created: 2020-08-08 09:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 649b6135d5147a1022904790cac5c88f SHA-1: 327bbaf23d35cbd3449b1875fe22c4b54e299a89 SHA-256: b7a5cb3c4f6d9d8460a76a8de153ea99ff9a734908b2f716854a60fba662c879
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 a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=symmetry+in+nature+pdf'. This suggests the document is designed to redirect users to malicious sites, potentially for phishing or malware distribution. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.cc/pify?keyword=symmetry+in+nature+pdf
    • http://files.calrhoavc.com/uploads/1/3/1/8/131871705/58fec6d19d12.pdf
    • http://files.mahasiddhasandmonks.com/uploads/1/3/1/6/131636843/wubenup.pdf
    • http://noruwu.philosophyandpoverty.org/uploads/1/3/2/6/132682883/69fcff3481e.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/tekawatefurulilofumowola.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/resumo_noes_de_administrao_pblica_para_concurso.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/99835873507.pdf
    • https://cdn.shopify.com/s/files/1/0434/3113/3340/files/3132170451.pdf
    • https://cdn.shopify.com/s/files/1/0432/8043/3302/files/97732570350.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4906/files/make_download_instead_of_opening_in_browser.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/gta_iv_tranier.pdf
    • https://cdn.shopify.com/s/files/1/0437/3377/8597/files/93197334939.pdf
    • https://cdn.shopify.com/s/files/1/0435/0862/9659/files/janome_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22700630349.pdf
    • https://cdn.shopify.com/s/files/1/0438/6576/8096/files/35656108410.pdf
    • https://cdn.shopify.com/s/files/1/0435/7203/5739/files/libros_de_aperturas_de_ajedrez_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0437/3564/6357/files/the_nutcracker_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000665e.bin
336b28dde47f02478dabfdb4dad2a4b5eb44d395719643819822b67aad46e824
pdf-font-stream PDF embedded font (sfnt) at offset 0x665E 5180 bytes
font_01_sfnt_off000077f2.bin
7cf677dcce82f1acd95dbbe31d175b3da58386dd94e2ec3067b272315ff43171
pdf-font-stream PDF embedded font (sfnt) at offset 0x77F2 10040 bytes