Malicious PDF — malware analysis report

Static analysis result for SHA-256 5150900f725afea4…

MALICIOUS

PDF

35.9 KB Created: 2020-08-20 10:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5d87c2bcf9e22336becff02ff80c5af SHA-1: fbb3fd974fb4b153d18e57e188388fc491f7f653 SHA-256: 5150900f725afea428ace2e4db358773a11be824f2aade685f785b9990db3ec4
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=beyond+compare++softonic'. This suggests a phishing or social engineering attempt to redirect the user to a malicious site. The document also contains a large number of embedded links, flagged as a PDF link farm, with the primary domain being cdn.shopify.com. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=beyond+compare++softonic
    • http://files.skin-official.com/uploads/1/3/1/4/131409761/sudibamap_wuvomewesejoko_fesome.pdf
    • http://fizaliko.janislynnecards.com/uploads/1/3/2/6/132695384/5602737.pdf
    • http://bagis.mollymidi.com/uploads/1/3/1/6/131606758/4432515.pdf
    • http://files.handfelted.com/uploads/1/3/2/3/132302894/kinipekelukipo-zerunixamorukat.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/jaxusugizokuzevixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/sinavaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/siwenowusunotetuvavenuka.pdf
    • https://cdn.shopify.com/s/files/1/0438/0190/3264/files/b_tech_information_technology_salary_per_month.pdf
    • https://cdn.shopify.com/s/files/1/0430/5482/5621/files/learn_german_fast_and_easy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57917948996.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/metallica_enter_sandman_guitar_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/1682/1672/files/p2p_magic_training_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/xisotexerutudepixidujaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0992/files/kukozod.pdf
    • https://cdn.shopify.com/s/files/1/0440/9245/7112/files/a_k_jain_physiology_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/nowilupotefuzigerepibipaw.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_off00004a20.bin
626e05fa39f0e9ea4ebfc4ae5a9de5afe2c13b3a10adf6d52f9b1af0f4cba1fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A20 5420 bytes
font_01_sfnt_off00005c79.bin
75dffa2292b06a94a27d2d331089c13d5470b964f5b03681aae86ba3c2f16033
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C79 10744 bytes