Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa593bc317fe7ac…

MALICIOUS

PDF

65.9 KB Created: 2020-09-04 01:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e165a0c08aba12be23f53cc0edb718d5 SHA-1: 7e2fd31fe29edabb53e3f1f39f91f7f9e5695c7a SHA-256: 6fa593bc317fe7ac35545212d48faa7e6dbe3851a8bb87966e755772b467b852
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, https://ttraff.club/wix?keyword=steps+in+bacterial+endospore+formation, is flagged as a malicious redirector. The document also features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, supporting the classification of this PDF as a malicious redirector.

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.club/wix?keyword=steps+in+bacterial+endospore+formation
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/xukezobaxax.pdf
    • https://cdn.shopify.com/s/files/1/0440/7833/4117/files/6478582749.pdf
    • https://cdn.shopify.com/s/files/1/0433/9423/6572/files/autodesk_inventor_professional_2015_full_crack.pdf
    • https://static.usrfiles.com/ugd/16879a_1f5a4567563a4f2ba8bb608a1ac9eadf.pdf
    • https://static.usrfiles.com/ugd/38955b_a27a2dbfffe34758a1a68f4cf773f07a.pdf
    • https://static.usrfiles.com/ugd/9219f8_ffe518b5cb1d465ab460cbbf1bea148d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1cc25ac370e2448e87dc807402b45e3a.pdf
    • https://cdn.shopify.com/s/files/1/0430/6419/7273/files/skyrim_immersive_weapons.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/21306239996.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/47063136630.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f45.bin
101de2e8c0fac47b161367409c4f7d389c8ece2a838f2be729ba6b306fbe2891
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F45 16548 bytes
font_01_sfnt_off0000a46c.bin
5edc8af723b412918264587297108115413897911829a69aa98f9ed00c56baa8
pdf-font-stream PDF embedded font (sfnt) at offset 0xA46C 5544 bytes
font_02_sfnt_off0000b728.bin
938e7ea90950b687debc5507fb18fcedb5e86409066f36370e3b473263ed6da6
pdf-font-stream PDF embedded font (sfnt) at offset 0xB728 15036 bytes
font_03_sfnt_off0000e65b.bin
9559dd1bd908241551916101fda3d445a26f5c4b506a1423f23393456f9d5940
pdf-font-stream PDF embedded font (sfnt) at offset 0xE65B 16036 bytes