Malicious PDF — malware analysis report

Static analysis result for SHA-256 d976a339aaf05f83…

MALICIOUS

PDF

46.0 KB Created: 2020-08-09 16:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea9294b1466765d104400d6d092b3dbe SHA-1: ae9677cde0dcc1aa96932e1b9d2da118e1dea41c SHA-256: d976a339aaf05f837890d7b73aad4330817a134f695eb204f1c4fa873a9f1699
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=elkay+ezh20+bottle+filling+station+pdf', is likely part of a phishing or scam campaign. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=elkay+ezh20+bottle+filling+station+pdf
    • http://files.billyberkouwer.co.uk/uploads/1/3/0/9/130969710/nilinajolod.pdf
    • http://files.delisodidit.com/uploads/1/3/2/3/132303061/vujosuxopibik-karimuzosososis.pdf
    • http://nodowopiz.akersart.com/uploads/1/3/1/4/131453540/5edfbc5963.pdf
    • http://files.puellarumacademy.com/uploads/1/3/1/8/131871849/vorejekej-momupi-retegavofuvon-funefa.pdf
    • http://files.jasperandwick.com/uploads/1/3/2/7/132712483/bononujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/xataxejagezo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0831/7850/files/16360595642.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/zibebivawuwasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/30574246022.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/finavelonitew.pdf
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/magekajevuvazurud.pdf
    • https://cdn.shopify.com/s/files/1/0438/5210/3842/files/simple_past_tense_exercises_perfect_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/african_customary_law_in_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5878/files/kitasen.pdf
    • https://cdn.shopify.com/s/files/1/0431/5624/2581/files/free_editor_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/47586866876.pdf
    • https://cdn.shopify.com/s/files/1/0438/0835/8561/files/98400098379.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4511/files/addition_table_1_12.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/
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/zibebivawuwasu

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007392.bin
59b2efb6bfb7ec70cb639fb7e4e82f6f1b4a7bc356699e7cd404b5fb5cda6633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7392 5796 bytes
font_01_sfnt_off0000875f.bin
d8ce97b23b25653f6ba8d27f9049e61ed2c74a227cdaf7094fbf1a31879fb813		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875F 10268 bytes

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