Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f92d46816bf612a…

MALICIOUS

PDF

54.6 KB Created: 2020-08-14 12:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab758f4510ccb06696b823f229da8c30 SHA-1: 5e3f17e71d1edc5b9d1f814d5609b3de5f7dad67 SHA-256: 8f92d46816bf612a6ec2de7e6b74835d67669d5a28018cb309db35b67bfbf158
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of the primary links, 'https://ttraff.cc/pify?keyword=liver+abscess+antibiotic+guidelines', is identified as a malicious redirector. This suggests the document is designed to funnel users through a series of links, potentially leading to malicious content or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=liver+abscess+antibiotic+guidelines
    • http://files.starburstprinting.com/uploads/1/3/1/3/131384635/xubijugozojo.pdf
    • http://files.denismorella.com/uploads/1/3/2/7/132740873/zuzekutokigure.pdf
    • http://files.samrahhairandbeauty.com/uploads/1/3/0/7/130739616/juwebupesom_lapupuluzon_rilanoj.pdf
    • http://files.peaknomads.co.uk/uploads/1/3/0/7/130738894/tonefifedojifaji.pdf
    • http://vexem.southwestpassages.org/uploads/1/3/1/1/131164250/4e5f9ad8c1.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6744/files/bimeralavemifadij.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8099/files/15665056720.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/61026588770.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/alchemist_book_in_tamil_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/39241544687.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5270/files/supewuguzifamunexokawo.pdf
    • https://cdn.shopify.com/s/files/1/0440/0054/2878/files/karezolirubakovawubawused.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/cover_letter_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8501/files/59608677341.pdf
    • https://cdn.shopify.com/s/files/1/0429/1336/6182/files/8th_grade_math_placement_test_california.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1265/files/championship_manager_17_coaching_badge_apk.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_off0000972a.bin
9b944a02987cc4c557bc696b0289591f6bc64c260cd795506effc9b8606a8d8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x972A 5248 bytes
font_01_sfnt_off0000a90d.bin
21a7b2c858c3bd80593767b9042b25b60c9ac925165bd8ecded1133d94cf1df2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA90D 10580 bytes