Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba71253e7622f7e…

MALICIOUS

PDF

49.4 KB Created: 2020-08-10 04:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 686ffc6e0003acf1bbcfddc47b2b9c59 SHA-1: af8c43845565115fb3adf80f5f46f0f8411f99bb SHA-256: 2ba71253e7622f7e5ff344a989aa9747d59448fe4dcbe6d7d16e59ecad6b67aa
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=teachers+day+quotes+in+english+pdf', is identified as a malicious redirector. The document body is heavily obfuscated but contains references to 'teachers day quotes in english pdf' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious link farm. The primary attack pattern involves leveraging these links for malicious purposes, likely SEO manipulation or user redirection.

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=teachers+day+quotes+in+english+pdf
    • http://files.cganim8tion.com/uploads/1/3/1/0/131070113/nesazivivafemakodusi.pdf
    • http://files.ceepromotionsbustrips.com/uploads/1/3/0/7/130739776/komufurodaxe.pdf
    • http://files.illuminatedjules.com/uploads/1/3/1/1/131164236/dixigoto.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7239/files/paramore_ignorance_lyric.pdf
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/ultimate_guide_to_google_adwords.pdf
    • https://cdn.shopify.com/s/files/1/0438/0357/4432/files/longman_dictionary_of_english_collocations.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/65417098762.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/98874291303.pdf
    • https://cdn.shopify.com/s/files/1/0434/3450/8455/files/take_on_me_lyrics_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/lesazapipuwax.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/ablerex_1500l.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38664456414.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9432/files/5284357425.pdf
    • https://cdn.shopify.com/s/files/1/0447/8812/1760/files/24991307563.pdf
    • https://cdn.shopify.com/s/files/1/0434/5695/4518/files/html_codes_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/9133103767.pdf
    • https://cdn.shopify.com/s/files/1/0450/5636/0600/files/nonlinear_composite_beam_theory_hodges.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/date_plus_days.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_off00008366.bin
e6ac7557354b9a46fe6f0aedef7879c28cd9e0b775a381e453f1c3ce605408a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8366 5596 bytes
font_01_sfnt_off00009668.bin
e65a76c6677acd51eea4bfb8d593701026a8606dbb18b2adb39ac43b3090a43d
pdf-font-stream PDF embedded font (sfnt) at offset 0x9668 10044 bytes