Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e0deb05149a4c4…

MALICIOUS

PDF

54.3 KB Created: 2020-07-27 22:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: b799a8deeb44951cdf71e563a40db669 SHA-1: e46f0e3a35f92cccd7b9121c47b82160f66d4158 SHA-256: 88e0deb05149a4c48f5891e277db1540761e51c33cfdfd88ede4abea2ccfb42a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'guitar pro tutorial pdf', indicating a phishing or scam attempt. The presence of a large number of external PDF links, many hosted on Shopify, further supports the idea of a link farm designed to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=guitar%20pro%20tutorial%20pdf In PDF document text
    • http://files.jazdesignphotography.com/uploads/1/3/0/8/130814459/9010870.pdfIn PDF document text
    • http://files.dysoncommunications.com/uploads/1/3/0/7/130775623/b5d6367eee.pdfIn PDF document text
    • http://files.kevinmoldenhauer.com/uploads/1/3/1/4/131483305/8169249.pdfIn PDF document text
    • http://files.bsa713.com/uploads/1/3/0/7/130738657/0aecd.pdfIn PDF document text
    • http://files.atech401.com/uploads/1/3/0/7/130775016/3519656.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/dukivunosejapuvadefevu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1705/1048/files/bidukuxiriwarubiguw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/23562090437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/61421283929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/59178645712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4947/6518/files/jomurux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/tegajugasip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/19657841504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/8172011999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0180/7007/files/kogasasixalokixosufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4899/files/tudimarofojagad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/fexipujugeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/98470071998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/mokemafakenonuno.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E48 4544 bytes
SHA-256: 72e72a7b29bec81e3ff5b0f16e48bb094120dc6eecad7b56cb414935922f43c9
font_01_sfnt_off00008dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCC 12352 bytes
SHA-256: 832eca75057fe2c27c18313caac505c345944d7b103939cd5e485e7b66161169
font_02_sfnt_off0000b435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB435 16312 bytes
SHA-256: b2563e85233037e3c2780690ed1455257f868516b5a962e54e6ffe29314c9cb1