Malicious PDF — malware analysis report

Static analysis result for SHA-256 10cde9288dee8e0b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-04 11:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28c6b5689184a1eca394d77d76efe3e9 SHA-1: 307c429d7dcc326d09a88f22eb5acec2d76b2c97 SHA-256: 10cde9288dee8e0be68f6c18f48869d4bbd7c20555c5d4839c01b516c2634ea3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a link farm designed to host numerous PDF files. One of the primary links redirects to `ttraff.com`, known malicious redirector infrastructure, likely to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

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/wb?keyword=process%20dynamics%20modelling%20analysis%20and%20simulation%20pdf
    • http://files.lisamccafferty.com/uploads/1/3/1/3/131383664/bamibitamurata.pdf
    • http://files.inspiredbytwoworlds.com/uploads/1/3/0/8/130873979/23a2c4818f1.pdf
    • http://files.wilmingtonedfoundation.org/uploads/1/3/0/8/130874109/tonomotazipujozosu.pdf
    • http://files.santacruzrotary.com/uploads/1/3/0/7/130775009/xisuxaxukodadi.pdf
    • http://files.outdoor-electric.com/uploads/1/3/0/7/130739509/dewidopimifufaropi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/fokulizifukowe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/61265018704.pdf
    • https://cdn.shopify.com/s/files/1/0431/4539/6386/files/vetepekasawoxul.pdf
    • https://cdn.shopify.com/s/files/1/0429/4161/2199/files/bujetivotefoxojes.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/kogig.pdf
    • https://cdn.shopify.com/s/files/1/0437/0700/7127/files/goveko.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/pudimixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/bugumeguvi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5216/files/vanabawitikamodifabivilu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9664/4511/files/48954572594.pdf
    • https://cdn.shopify.com/s/files/1/0429/9204/2137/files/43942730378.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/kovibowuzawirogalufuped.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/2340447339.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061a7.bin
9951eb39b24b653d428d5f96fb2faa9653d57b379dc098f0c1dae7a84925d768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A7 5576 bytes
font_01_sfnt_off00007496.bin
0225dc748038633952fe6f80b615847f712e28d5d942b16ba80ab651fb9138a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7496 12028 bytes

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