Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ee7872b518e759…

MALICIOUS

PDF

41.7 KB Created: 2020-08-15 01:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 754cd76e0cac619a7b3cbc26bc48d240 SHA-1: 27f24939590ee854306e770bfaf5dfd4d0689d8c SHA-256: 63ee7872b518e759f726f05dc5af6bda730e4a529378b43da08c49066d2b972d
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wb?keyword=ebook%20pdf%20free%20download%20marathi', is flagged as a malicious redirector. The document body also contains this URL and appears to be a lure for free ebook downloads, suggesting a phishing or scam attempt. The ML classifier strongly indicates 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/wb?keyword=ebook%20pdf%20free%20download%20marathi
    • http://files.sistersvillageinc.org/uploads/1/3/0/7/130776368/sesemopo.pdf
    • http://pusideki.rockphenoms.com/uploads/1/3/1/6/131606420/1119340.pdf
    • http://kivilaje.losangelestoyandminiaussies.com/uploads/1/3/2/6/132695492/89025.pdf
    • http://files.wbphoto.org/uploads/1/3/1/4/131438667/wexawigumat.pdf
    • http://files.sugarinthegourdband.com/uploads/1/3/1/4/131452935/sodefomipowod-jebivel-vixolumumejeb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/all_i_want_for_christmas_is_you_piano_easy.pdf
    • https://cdn.shopify.com/s/files/1/0434/6966/8517/files/51968012426.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/ankle_block.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/texirid.pdf
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/fundamental_accounting_principles_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/84085431166.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/definition_of_agricultural_science.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/boot_camp_fitness.pdf
    • https://cdn.shopify.com/s/files/1/0435/4103/7208/files/barriers_to_entry_in_monopoly.pdf
    • https://cdn.shopify.com/s/files/1/0430/4922/2298/files/68386426061.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1674/files/46981268317.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006589.bin
33ee97a0571ee29915ecec6f6cc083d0e4ee91262eab82d6d7998c549791f69a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6589 5356 bytes
font_01_sfnt_off000077a6.bin
65b0ab482c9fe77ec2a262989e32553950d64aaab5cb0c547abd1801ef404f8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A6 9932 bytes

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