Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f8f823f317ac8d1…

MALICIOUS

PDF

40.9 KB Created: 2020-08-07 00:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70bdd2e95c86d2227ab4fa21b78ab8ad SHA-1: 170173dbbe0feaa821a2d3a8830258f2fdc870fe SHA-256: 1f8f823f317ac8d178bd043698c0dd29ebb0ef2287b21a8ad5251dc3b5ceb61d
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=galileo+by+bertolt+brecht+pdf'. This indicates the document's primary purpose is to redirect the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which are hosted on Shopify but point to PDFs with numeric or book-related slugs, suggesting a potential SEO poisoning or content-luring tactic. The document body itself is heavily obfuscated and contains the malicious redirector URL, reinforcing the attack pattern.

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=galileo+by+bertolt+brecht+pdf
    • http://bifivuf.nanaspizzapr.com/uploads/1/3/0/7/130776486/xopobibapugasidobisa.pdf
    • http://files.claudiovenancio.com/uploads/1/3/1/3/131379552/mujivixaregukavedivi.pdf
    • http://files.shaynaleecoaching.com/uploads/1/3/2/3/132303010/femiwapat.pdf
    • http://files.laurelvictoriagray.com/uploads/1/3/2/3/132302759/9655515.pdf
    • http://telubowig.indranisingh.com/uploads/1/3/2/7/132710779/fokamabamilufut.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/chaos_engineering_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/3056/1447/files/251928900.pdf
    • https://cdn.shopify.com/s/files/1/0431/8747/0494/files/38326023916.pdf
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/55749304990.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/80875195555.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/83264027966.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/sizigitupukapepavugo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4578/8565/files/28443073633.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/present_simple_exercise_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7710/files/jogurifewi.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/french_arabic_dictionary.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_off000062b4.bin
7c5e525ab51c1fa736b290fdbe51e528e46e44ae60e5e2670ee7e3a50f1a7a2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B4 5340 bytes
font_01_sfnt_off000074d8.bin
0865acdd4f0644e06eeee98b24f6184bfb2b2901e4241537254657993b6a496a
pdf-font-stream PDF embedded font (sfnt) at offset 0x74D8 9944 bytes