Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce422b5978c7658…

MALICIOUS

PDF

49.0 KB Created: 2020-09-02 21:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c436df662ba1a385b201cd7b369067c6 SHA-1: 644ae34e5838526370f041f353b3ad71b502c05c SHA-256: 6ce422b5978c76580d4111e364826f5310e91bbbb615edb3dacd4092971f6339
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text that appears to be a lure for content related to 'cid new episode 3gp 2018'. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to further malicious content or exploits.

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.me/pify?keyword=cid+new+episode++3gp+2018
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/76628994591.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/how_to_delete_ark_mods.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/borel_sigma_field.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32177526878.pdf
    • https://cdn.shopify.com/s/files/1/0432/0555/8436/files/14419380787.pdf
    • https://static.usrfiles.com/ugd/b8c837_be0ec9187d7547169cc924ad384d5531.pdf
    • https://static.usrfiles.com/ugd/162fe6_19c55da8a5e74f879ee6644ad3c4b2e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_072b4975e4c64ac4a3ebded16938a1e0.pdf
    • https://cdn.shopify.com/s/files/1/0432/1050/6404/files/sovifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/dadifobakasikegesekusavap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42257023754.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular
    • 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_off00005d5c.bin
ab805f47e226b2cf214db6c310c40f8a11b09ddb0dbbe96383639a77b9125933		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5C 5468 bytes
font_01_sfnt_off00007023.bin
9ec4703a9328eb6d9f969916cc78dc28dcf2a3b640b2f0dfa49ccd3e126314ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7023 4652 bytes
font_02_sfnt_off00007f37.bin
f2f1e7e4be4f6894afc23414249d29798f5b0d95bdc5128cdb1c8e3e44002573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F37 10280 bytes
font_03_sfnt_off0000a25a.bin
d8a1a34de14a7b8fce5e51635835121d353d188f9ac9ce1e11538509fd4c5cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA25A 16060 bytes

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