Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a718514820725b…

MALICIOUS

PDF

74.9 KB Created: 2020-08-22 14:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d67df2a74b05d78d3a7a33c083153ed SHA-1: 92477867259fa3de7fb7c05825f257524727f007 SHA-256: 88a718514820725b35114040d746b6c740dfed68f30ec7ba0b0313c574380f19
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to obscure the malicious destination.

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=perimeter+and+area+word+problems+algebra+worksheet
    • http://files.outandaboutwithmskala.com/uploads/1/3/1/4/131453522/kanomapixidisofuj.pdf
    • http://fevovovu.xboxrepairlakeland.com/uploads/1/3/1/3/131383791/xazoravopuzujizagome.pdf
    • http://files.twigtravel.com/uploads/1/3/2/8/132814826/a0bcf6c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/18459640610.pdf
    • https://cdn.shopify.com/s/files/1/0434/3260/7894/files/superpages_pr_com.pdf
    • https://cdn.shopify.com/s/files/1/0430/8008/9760/files/xuvuxufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2732/3301/files/35212813174.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/28847655661.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/forofafivoranakita.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/64286063701.pdf
    • https://cdn.shopify.com/s/files/1/0437/4714/7925/files/estimation_and_costing_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0446/1517/2259/files/morfologi_columba_livia_journal.pdf
    • https://cdn.shopify.com/s/files/1/0454/3918/9142/files/misurizinifibip.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4647/files/78861496569.pdf
    • https://cdn.shopify.com/s/files/1/0454/6491/2024/files/26860815602.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5cc.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CC 2828 bytes
font_01_sfnt_off0000dfc6.bin
05e498174dec38ed6bff6c5bc61047368fef6c8fc278d02e3dc474386f81d1d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC6 5672 bytes
font_02_sfnt_off0000f2e2.bin
d3467d3c546aeb753e37b92ebb4c36ecc8166a801d2f26a987bf05c526843c02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 12752 bytes

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