Malicious PDF — malware analysis report

Static analysis result for SHA-256 69183aa25e3af46a…

MALICIOUS

PDF

49.0 KB Created: 2020-08-21 00:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41ebc8a223369dc4fb531f7783e44fca SHA-1: 783bbc486a173b441dca650e0fa76a05128e3922 SHA-256: 69183aa25e3af46a489f970a35f93f167195b76e8011112e8124525e1537e086
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised with a keyword related to a game mod. This indicates an attempt to lure users to malicious infrastructure. The PDF also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic to increase visibility of malicious content. The ML classifier 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.cc/pify?keyword=robbery+bob+mod+apk+android-+1.+com
    • http://files.raresilentfilms.com/uploads/1/3/1/4/131406412/c6e37185.pdf
    • http://gulid.4hresearch.com/uploads/1/3/1/4/131437981/21c79b9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/codycross_answers_app.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/11371109558.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/intermediate_2nd_year_zoology_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/cfo_resume_templates_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/nemapisiwaduvegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8758/5699/files/algebra_2_unit_1_test.pdf
    • https://cdn.shopify.com/s/files/1/0447/3192/4629/files/donapubebaji.pdf
    • https://cdn.shopify.com/s/files/1/0437/0969/4107/files/indenting_excel_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/zejugirujurum.pdf
    • https://cdn.shopify.com/s/files/1/0439/3133/6859/files/68252563798.pdf
    • https://cdn.shopify.com/s/files/1/0427/7813/2636/files/rurugiko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/bluetooth_4._0_pc.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007428.bin
f4a599474bef0929984f531d8ebb864a30f04090592d6d1764d7c23a82772300		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7428 5144 bytes
font_01_sfnt_off00008596.bin
c3e2ac94aefd5bb878ef94dd4a90390e397f80500bd4cf9808a0e8ad713c31a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8596 10432 bytes
font_02_sfnt_off0000a955.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA955 4324 bytes

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