Malicious PDF — malware analysis report

Static analysis result for SHA-256 692be2deeaf4369c…

MALICIOUS

PDF

36.8 KB Created: 2020-08-08 06:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cad548b8849a3942834cf62c43d91be1 SHA-1: b65480b0d90bb55c1a0a5b5fba1b2327ed48f87c SHA-256: 692be2deeaf4369ca3b153033a178a639098ce809033d8373ec62dadf1851d57
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for distributing malware or phishing content. The document body, though heavily obfuscated, contains references to academic papers and the redirector URL itself, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links, many pointing to Shopify, indicates a potential link farm used for SEO manipulation to improve search engine ranking for malicious content.

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/wb?keyword=jurnal%20tentang%20pupuk%20organik%20cair%20pdf
    • http://fenubeja.yourheartspath.com/uploads/1/3/1/3/131379312/gajebuxaxe_jegedidomigomow_silitor_tiwebefegas.pdf
    • http://files.lakecountyiltransition.com/uploads/1/3/0/7/130739154/775147.pdf
    • http://files.alpha-nursery.com/uploads/1/3/1/4/131407152/5150c6fcd.pdf
    • http://files.egonbernhard.com/uploads/1/3/0/7/130775228/2242788.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/0848/2724/files/barron_essential_words_for_the_ielts_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/trumpet_voluntary_noten.pdf
    • https://cdn.shopify.com/s/files/1/0432/4691/1643/files/dr_collins_pcat_study_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/96046822929.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/94367277645.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/tawutanosijitowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6059/files/77084380157.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/binos.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/35127049668.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/23865453582.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/learn_sql_tutorials_point.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/jinidafizol.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_off000045cf.bin
74ebdb13e29761bb2fc477bd620cd3583c91e808987703b4fb9f590afb604bb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45CF 5080 bytes
font_01_sfnt_off00005722.bin
5adb1e14e3a8ac4aa236ece05040330054bf85fecd5f6a64ec54e042f30f13ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5722 9672 bytes
font_02_sfnt_off0000783a.bin
ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783A 4324 bytes

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