Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2f82a8b9c2b881…

MALICIOUS

PDF

57.8 KB Created: 2020-08-18 17:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 938048876f579f54e6ffab18f1762145 SHA-1: 2a9a7ed597b91f30a8270bf00af9472059ef4dfb SHA-256: 6c2f82a8b9c2b8815229a2d740a45757ffc9053c010bebff20241ffc143008ff
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a redirector for a 'camera 360 ultimate premium apk'. This suggests a lure to download potentially unwanted software. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links indicates a link farm strategy. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.com/pify?keyword=camera+360+ultimate+premium+apk
    • http://vajur.katekinsey.com/uploads/1/3/1/1/131164250/kaxopi_geposenovolaluv_dotinojajujab_xulam.pdf
    • http://vubiga.myvirtualvacations.net/uploads/1/3/1/6/131637814/2597747.pdf
    • http://files.mrcmathclass.com/uploads/1/3/1/3/131379832/dijoxiju_debowazebe_kavumugubaxuvar_zemosatonas.pdf
    • http://lizis.spectrian.net/uploads/1/3/1/3/131383483/jomorenivikujiwupe.pdf
    • http://files.donaghtruaghcommunityemployment.com/uploads/1/3/0/7/130739826/1a8a8c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5435/7910/files/99114368266.pdf
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/jigoxuwopidobizedoti.pdf
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/94229165700.pdf
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/lesewubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/autograph_hd_movie_tamilyogi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/91123523117.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/best_rooting_app_for_android_7.pdf
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/kolokujupakomidu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007484.bin
cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7484 2952 bytes
font_01_sfnt_off00007f13.bin
6ccffab42053a3d37a83bca38b06c95a6aa7329abc77a3b59e21af49a6db0ee1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F13 5216 bytes
font_02_sfnt_off000090ab.bin
ce37388b9e182791505165aa75f0d81c1b3188ee799c23ea5a13647705695c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90AB 3984 bytes
font_03_sfnt_off0000a0a4.bin
2587a8ebab38daff1123c919a929123b57e644e81e2329d4b76818ef1374685b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A4 10384 bytes
font_04_sfnt_off0000c42a.bin
52510e4d70f3557fee5b5bbf0d3e68e4933a76b26214029a49039486d04c3985		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC42A 16224 bytes

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