Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b78c812bdb0e255…

MALICIOUS

PDF

47.0 KB Created: 2020-08-23 02:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 530989416b585d3e3c994f8c1e2f6a0b SHA-1: f14c57e6ab329edacfe32bddda00303d11b9c7c4 SHA-256: 0b78c812bdb0e255566abfb0f3e22a97f74e76e7726d958bb11c2d01f9c2d649
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'heloc payment calculator excel template', suggesting a lure to trick users into clicking the malicious links. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for phishing or malware distribution.

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=heloc+payment+calculator+excel+template
    • http://dozulik.iconicplumbingtx.com/uploads/1/3/0/8/130814328/dogiso.pdf
    • http://files.geologicalsocietyct.org/uploads/1/3/2/7/132710671/d21506.pdf
    • http://files.pestcontrolfortworth.net/uploads/1/3/1/6/131637056/7505306.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/xugogunirulifirax.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/maths_formulas_upto_class_12.pdf
    • https://cdn.shopify.com/s/files/1/0428/7869/7631/files/santa_rampage_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7057/files/jalusujep.pdf
    • https://cdn.shopify.com/s/files/1/0434/5122/0133/files/bejigiguvoputode.pdf
    • https://cdn.shopify.com/s/files/1/0433/0763/0747/files/ceridian_online_pay_statements_tax_forms_epost.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/8004415041.pdf
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/xewadirazalonoraw.pdf
    • https://cdn.shopify.com/s/files/1/0438/5262/8118/files/rexoxomunokibuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/cursos_de_ingles_avanzado.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/nusoromonema.pdf
    • https://cdn.shopify.com/s/files/1/0435/4483/8303/files/thin_formica_sheets_uk.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/7241162467.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_off000078c8.bin
440d85bd1ef1dad9005acae593e9be3399a5b18a1334b396d8cee86f4664c7f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C8 5032 bytes
font_01_sfnt_off000089d2.bin
80e2f64ae3417f84878aab8a467b537de0a37eefae7cc282c3b78f8ba68b8a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89D2 10908 bytes

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