Malicious PDF — malware analysis report

Static analysis result for SHA-256 049afd898bededef…

MALICIOUS

PDF

44.1 KB Created: 2020-08-04 02:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4df7febab2b35692033ed63fe1a0175c SHA-1: c833e79f86434ab2ecd35ac0f64522cb5ae3c8b6 SHA-256: 049afd898bededef571add358bac22eb41c295254582838add13bad3a2e6e6cd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, suggesting an attempt to lead the user to a harmful site. No scripts were extracted, but the presence of many links points to a link-farming or redirection attack.

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=global+food+and+beverage+industry+pdf
    • http://pofepami.mabarnes.com/uploads/1/3/1/3/131380005/fevedab_tagepebafesej_bodiko.pdf
    • http://files.davidferngolf.com/uploads/1/3/1/4/131453005/nerelosafatokomef.pdf
    • http://files.uroco.co.uk/uploads/1/3/0/7/130776296/virojawozutela.pdf
    • http://duzudati.jeffcolibraries.org/uploads/1/3/2/6/132681488/juluwureluze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2885/6477/files/dotufogoson.pdf
    • https://cdn.shopify.com/s/files/1/0435/9490/7810/files/cases_in_healthcare_finance_fifth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2922/files/57644632541.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/wordpress_install_script.pdf
    • https://cdn.shopify.com/s/files/1/0436/0162/5252/files/xukisuvosigiwalifalirekod.pdf
    • https://cdn.shopify.com/s/files/1/0433/9974/1596/files/7222368009.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/4604634722.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/22450279310.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/brown_bear_brown_bear_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/jowuduwokuludesobokager.pdf
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/6257766025.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/42976331114.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/37933018032.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_off00006cb0.bin
b43f308db255d4e72f3ff7ded8af1171f256f13eb61123f4e6dad245a3cecb47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB0 5540 bytes
font_01_sfnt_off00007fa8.bin
bb6004946b66ee9987dbe9d190e4cd1d20ab59f47a7bcee10c666a97318eb521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA8 10356 bytes

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