Malicious PDF — malware analysis report

Static analysis result for SHA-256 0189ca2b84467b92…

MALICIOUS

PDF

44.0 KB Created: 2020-08-24 21:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c59f4d699956e8f78f1d24716938945 SHA-1: 2ad69ce085d9b0947b0bfe496b36477a00bcfbda SHA-256: 0189ca2b84467b9231eaea2faa1213d97eb37928e493e53f71f88b9f6bf8770b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of external links, many pointing to Shopify domains, forming a link farm. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting an attempt to trick users into clicking through to malicious content.

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=colonial+america+map+worksheet+answers
    • http://files.crownjulesrealty.com/uploads/1/3/0/9/130969053/19c3c0f02693a.pdf
    • http://files.upyourbutt.org/uploads/1/3/1/6/131606011/9436109.pdf
    • http://files.pigandink.com/uploads/1/3/2/6/132696030/xedasot.pdf
    • http://zufup.helloworldwerehere.com/uploads/1/3/1/8/131871825/depudivutopezunu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/2222/0439/files/csgo_crosshair_commands.pdf
    • https://cdn.shopify.com/s/files/1/0437/1457/6537/files/gorav.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/31164159672.pdf
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/25723790183.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/add_stylesheet_to_html.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/godumowodegapevozovubulow.pdf
    • https://cdn.shopify.com/s/files/1/0432/4563/3691/files/90838412382.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/xalonakonorele.pdf
    • https://cdn.shopify.com/s/files/1/0438/1969/6290/files/ve_maahi_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20807514836.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/atomic_absorption_spectrophotometry_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/85987113776.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_off000060e3.bin
81515a66b24578b65c611b477430319923157dfdb2fda0779e1c2536cd3d9280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E3 5140 bytes
font_01_sfnt_off00007235.bin
d32473ed18c4a270e4aa24451b1f37a7c47b1c30d10517621988af0cc7d11372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7235 10192 bytes
font_02_sfnt_off0000951c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x951C 4324 bytes

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