Malicious PDF — malware analysis report

Static analysis result for SHA-256 90abf8b0f7161c75…

MALICIOUS

PDF

39.0 KB Created: 2020-08-22 17:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba8f33af78cea1aa512df669e611a3d6 SHA-1: 119af31a96534b2a4a4bf62fb77c6c61ec14da46 SHA-256: 90abf8b0f7161c75f1d63f0f396514aafcee4661279da04c0b64a5d2b4d254bb
150 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting seemingly benign documents, but one critical link redirects through ttraff.com, a known malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting a lure to download or view academic content that ultimately leads to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=bsc+1st+year+physics+practical+experiments+pdf
    • http://jelib.cityskyflooring.com/uploads/1/3/1/3/131383664/7044736.pdf
    • http://vozew.aquashieldinc.com/uploads/1/3/0/9/130969521/tivijizofagadazar.pdf
    • http://pubaj.reinbowridingcenter.org/uploads/1/3/1/4/131407535/203f8eccf7e8c9.pdf
    • http://tinura.profile-360.com/uploads/1/3/1/6/131606227/kifik_woxiv_kufuma.pdf
    • http://files.centerofhopemtp.com/uploads/1/3/2/3/132302888/8e9a03ef9fcb98.pdf
    • https://cdn.shopify.com/s/files/1/0436/1325/7885/files/12080203647.pdf
    • https://cdn.shopify.com/s/files/1/0431/2711/1841/files/bitwise_operators_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/osha_10_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/blank_calendar_2020_19.pdf
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/fundamentals_of_computer_networking_and_internetworking.pdf
    • https://cdn.shopify.com/s/files/1/0429/0510/8636/files/weekly_lesson_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/buvuwukuvuguguramigidi.pdf
    • https://cdn.shopify.com/s/files/1/0454/4344/8990/files/belzona_1221.pdf
    • https://cdn.shopify.com/s/files/1/0438/8097/2456/files/jet_boy_jet_girl.pdf
    • https://cdn.shopify.com/s/files/1/0437/3577/7445/files/housing_bubble_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0037/files/allstar_performance_heated_tire_groover.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/bruel_and_kjaer_vibration.pdf
    • https://cdn.shopify.com/s/files/1/0431/1823/1709/files/61931288559.pdf
    • https://cdn.shopify.com/s/files/1/0432/9095/1846/files/15657118470.pdf
    • https://cdn.shopify.com/s/files/1/0435/4234/7927/files/cinema_media_player_classic.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_off00005a0c.bin
67d9d83a41ccc3b68ffd571fc3c728f1d8b6a1802e369b3bbdfc05d759993c87
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0C 5664 bytes
font_01_sfnt_off00006d35.bin
9bfc0a8499096e9e79c55132bcd740bd8fc0c8fdd094b25dd6071d755afb498f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D35 9660 bytes