Malicious PDF — malware analysis report

Static analysis result for SHA-256 033594bb71ba5cfe…

MALICIOUS

PDF

47.7 KB Created: 2020-08-11 19:10:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c31686a4e06c56daa5e18789673db974 SHA-1: 0d2185a7754b8e2ca6c044cf332aee79b52dc4f9 SHA-256: 033594bb71ba5cfe3835abac99ea169120db272fcbafd9526e2cccf541a622e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with numerous embedded URLs, including a primary redirector at `https://ttraff.ru/pify?keyword=export+pdf+with+crop+marks+photoshop+cc`. This suggests a phishing or scam attempt designed to lure users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=export+pdf+with+crop+marks+photoshop+cc
    • http://files.techsmartdeals.com/uploads/1/3/0/9/130969158/dujukifikizokuwatul.pdf
    • http://siweje.sejenkins.com/uploads/1/3/0/9/130969723/3903467.pdf
    • http://files.audreymarychapuis.com/uploads/1/3/0/7/130776828/8987641.pdf
    • http://files.demondfernandez.com/uploads/1/3/1/0/131070317/bf8bd.pdf
    • http://files.xlsoftfruit.co.uk/uploads/1/3/1/8/131857315/0ae2741e3d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2322/0392/files/93719217228.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/bronkiektasis_terinfeksi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/sezipovomekaxesizuvofaze.pdf
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/67915124355.pdf
    • https://cdn.shopify.com/s/files/1/0430/4591/2727/files/9th_class_physics_book_punjab_textbook_board_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/jixozok.pdf
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/27968133478.pdf
    • https://cdn.shopify.com/s/files/1/0431/1816/6167/files/zusegiwilukikizovijuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/11286499769.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/megaloblastic_anemia_pathophysiology.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/el_angelus_oracion.pdf
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/vezenodizodoz.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000655a.bin
d3e3473bd165254c2a03932a9efd7cab3c03f96989e9f1ef080b63ae93a6c5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x655A 5544 bytes
font_01_sfnt_off00007824.bin
8358985565aaa330d0bec16dcbc8d6b2dc4312851f39616d588a7f1c81520503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7824 10360 bytes
font_02_sfnt_off00009bcb.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BCB 16312 bytes

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