Malicious PDF — malware analysis report

Static analysis result for SHA-256 6693c6307b6ac277…

MALICIOUS

PDF

50.7 KB Created: 2020-08-06 15:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09852152c7c8c6b81373137bdfb869cb SHA-1: 8654f3ffd8ac40014bb8e9cc5d3f82f2e8415b6f SHA-256: 6693c6307b6ac27725ee7bb3e8e899a2080f746026a707f57c80e5a005f37520
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.com. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. 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=database+management+system+pdf+for+bsc+computer+science
    • http://files.heartlandcustomfarmtoys.com/uploads/1/3/2/6/132695505/8835882.pdf
    • http://files.bookhivebeerclub.com/uploads/1/3/0/9/130969910/f65beae6b726.pdf
    • http://files.brittanypelias.com/uploads/1/3/0/8/130874493/3c6ea0f4cb07879.pdf
    • http://files.shanestay.com/uploads/1/3/1/4/131437017/ganuguwuradibeba.pdf
    • http://files.ollivlogs.com/uploads/1/3/0/7/130775970/lovidizosavo_vosevufanovog_rifavebada_towafedidoke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3183/8368/files/fire_red_cheat_codes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/best_fallout_new_vegas_mods.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/84202832187.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/xipitijunafubolopasu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1017/6662/files/roxaduvinuxog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2757/0596/files/puzolevubesiwemeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/6117/2631/files/2429170664.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdf
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/53447985477.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/pafijajun.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/69310682277.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/sineviwawagipewami.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/nesowigiwonowewatul.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/nomirekadezizom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007261.bin
ac9c9665f2e802ae9d9838db8795d25da0d3b075d172c4b1f1570c9b8d1b79d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7261 5684 bytes
font_01_sfnt_off000085ae.bin
506054631b2c641618f3317ffaac8a66ca72bc0eb4bbc91f48f870e80d9dcfbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85AE 9960 bytes
font_02_sfnt_off0000a800.bin
366b2a3ed9b44e620159a8175e6f9935b0189d17b94b4d5ccfd5980b0b155f3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA800 16112 bytes

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