Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a13c2c5410ec0a…

MALICIOUS

PDF

51.4 KB Created: 2020-08-18 16:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c0634b1465ebfee1f6b645aaff22d45 SHA-1: f3b96ef4d47201f08ec07f9a8e73639a35e4ec51 SHA-256: 00a13c2c5410ec0a23fea61fc97f351f92682eabbe3578416dad24ccf8277878
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as information about hypertension guidelines. This indicates a phishing or social engineering attempt to lead the user to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=aha+new+hypertension+guidelines+2017
    • http://nubukofa.myboomx.com/uploads/1/3/2/6/132695306/1446849.pdf
    • http://files.rycroftlabradors.com/uploads/1/3/0/7/130776096/lisadupifu.pdf
    • http://monirovak.hedongreenprint.co.uk/uploads/1/3/0/8/130874683/2225909.pdf
    • http://files.saikmusic.org/uploads/1/3/2/7/132740415/67c8893d65fe7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/8904/9238/files/22466121989.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7688/files/entrepreneurship_education_in_secondary_schools.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6453/files/introduction_to_addictive_behaviors_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/1597/7630/files/bisaguzawegires.pdf
    • https://cdn.shopify.com/s/files/1/0432/7922/0891/files/b_d_burgers_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0789/files/59835625452.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/60093684875.pdf
    • https://cdn.shopify.com/s/files/1/0434/8307/0630/files/fuposove.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/morijodenilijenegonosiren.pdf
    • https://cdn.shopify.com/s/files/1/0428/6945/7063/files/vukupibimatobofanisobiti.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/vowizawudabevudi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5377/files/lists_in_r.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_off000076be.bin
ecb2b7665a89be7da0140c6a1609f13c2e4941af238b4eed64e9bd162ce0d07c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BE 5692 bytes
font_01_sfnt_off00008a3a.bin
fc59239b3f95e332b634ecf48df0db5931c4245ccd1eb6b4ccaeb6bbdae416f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3A 12428 bytes
font_02_sfnt_off0000b273.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB273 4324 bytes

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