Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d5523f90ae0a48…

MALICIOUS

PDF

54.0 KB Created: 2020-08-09 13:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc9d8acc34242ce0e5f19bc13e3e7621 SHA-1: b202a38f602290a91bf5fe8dbd1e029f036cb7d0 SHA-256: 69d5523f90ae0a4890d51ef34e33a48fe9c9c991f418369b83ed0e9d56c4639a
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure to download content, which is a common tactic for phishing or malware distribution. The ML classifier also 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=amaravati+kathalu+book+pdf+download
    • http://files.keithrobertson.org/uploads/1/3/0/7/130776769/fetopo.pdf
    • http://boxunibil.pensingerfinancial.com/uploads/1/3/1/6/131637814/969ab43.pdf
    • http://files.michiganroofmasters.com/uploads/1/3/0/9/130969925/xipudumawalim.pdf
    • http://files.swtradingcompany.com/uploads/1/3/0/8/130873769/1018955.pdf
    • http://juwav.marksmobilehomesupply.com/uploads/1/3/0/8/130874359/pegezafipofexas_nonomogigir_jalonaduko_gijija.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/26630857316.pdf
    • https://cdn.shopify.com/s/files/1/0430/6855/5415/files/rexefegisufukof.pdf
    • https://cdn.shopify.com/s/files/1/0437/0916/9815/files/bailey_and_love_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/9262/1978/files/wka_rule_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/81919285212.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/fixama.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/nutux.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/advanced_bushcraft_101.pdf
    • https://cdn.shopify.com/s/files/1/0435/8632/2600/files/skoda_amundsen_bedienungsanleitung.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/xeduziluguzurekadav.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/ranged_attack_disadvantage_5e.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/jugaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/0481/3721/files/zisotokesab.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000592c.bin
a3ff6a2284038200f4828ba5ba9a46e03ed52933c80d7444290855006e970de1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x592C 5212 bytes
font_01_sfnt_off00006ab9.bin
ff0794aab67fff5a89a672e3a197df04347e43b5fba1d8a2ca13a7312536c135		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB9 19560 bytes
font_02_sfnt_off00009931.bin
cc476d84ed8472a2a8a46df08b39b7942161057301612dea62b51f0e7d431bec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9931 10276 bytes
font_03_sfnt_off0000bc47.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC47 4324 bytes

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