Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cace027df04a31c…

MALICIOUS

PDF

40.8 KB Created: 2020-08-06 20:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16fd1e753d54e66c3570992baacd0362 SHA-1: dad9f0450a3efd1979c9b7638dfc3f4c0c723132 SHA-256: 4cace027df04a31c5e4a3f99a6bee70fddd75908096cac714a10333749ddc2bf
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, forming a link farm. One of these links, https://ttraff.cc/pify?keyword=at+t+netbond+pdf, points to a known malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely leading to further compromise.

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.cc/pify?keyword=at+t+netbond+pdf
    • http://files.michellewillis.ca/uploads/1/3/1/6/131606128/1336053.pdf
    • http://files.makeupbymau.com/uploads/1/3/0/7/130738911/mukatapuruz-kobopasig-kimoranezexajex.pdf
    • http://files.studioappalachia.com/uploads/1/3/2/6/132681823/mofikow.pdf
    • http://files.relicwinecellars.com/uploads/1/3/2/3/132303337/mojegepuwomaxojukeza.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/dufitirekupomexipixav.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7464/files/how_to_become_a_good_programmer.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9460/files/novunobimakubogagedezemus.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/tipaxozat.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/24623334738.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/wafabogozilu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/xedukuvuvozoxilaretubulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/xiworomesifikidepuzos.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/sportdog_collar_manual.pdf
    • https://cdn.shopify.com/s/files/1/0450/3171/9070/files/carbon_nanomaterials.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/22635210608.pdf
    • https://cdn.shopify.com/s/files/1/0429/5688/2086/files/72046852303.pdf
    • https://cdn.shopify.com/s/files/1/0436/7931/8166/files/waiting_for_godot_download_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/punibulunevexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9268/0605/files/neoclassicismo_storia_dell_arte.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/
    • https://cdn.shopify.com/s/files/1/0431/9

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ee.bin
ed0615e08ea62b4fae2abaa919682462c5065d01a9019dda0d430ee5346dab1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62EE 4648 bytes
font_01_sfnt_off000072d1.bin
f6b7debd79ab80ce83ec6ebf243cbbf1e5ba75bd3c7030b0fe8412300eea6f33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 10420 bytes

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