Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd4302648654757…

MALICIOUS

PDF

36.8 KB Created: 2020-08-20 18:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18e76bb667d2b58291cdc3b92523e75e SHA-1: 7b9b97174691e70d900a603a47fa7bde00f92f76 SHA-256: 0bd430264865475728c875242f43594fdf6d598b02953c988ee3e6b382080aa1
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to lead users to harmful content. The document body, though partially corrupted, contains the text 'Fresh pasta sheets near me' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious.

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.ru/pify?keyword=fresh+pasta+sheets+near+me
    • http://bodikud.arturoaguilarphoto.com/uploads/1/3/1/3/131381679/fixukumodedinapap.pdf
    • http://files.inspirevoices.co.uk/uploads/1/3/0/8/130814644/mirobev-nasirel-zidelerekik.pdf
    • http://files.kidsthatcan.com/uploads/1/3/2/6/132681647/0aa0bc909782bd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/degakuvagebatoraso.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/43192430368.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/best_fallout_new_vegas_mods.pdf
    • https://cdn.shopify.com/s/files/1/0440/1473/1429/files/brazil_food_guide_pyramid.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/numeros_romanos_del_1_al_100_completos_en_orden.pdf
    • https://cdn.shopify.com/s/files/1/0429/1959/2099/files/26584028609.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/63893893986.pdf
    • https://cdn.shopify.com/s/files/1/0431/7790/2234/files/flexner_report_summary.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/fl_studio_full.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_off000052f4.bin
821a4cc31b5ae5e1a6aeb4c5de654043073174d2920bb318b580e5aec3fc06b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x52F4 4984 bytes
font_01_sfnt_off000063b9.bin
0426db1020047b0586eecbaa359ffb5e01a1553216f1190fb1b500ae12d36a3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x63B9 10224 bytes