Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad804ce5e5cdefe…

MALICIOUS

PDF

58.9 KB Created: 2020-08-18 16:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0255c65dbc12135434fb3d878c33f314 SHA-1: cc19c1b00c9cf3e5eba08488648603414d1aa3e7 SHA-256: 6ad804ce5e5cdefe558edac5c4af2397c85b6c5e4f3cfb3eb80f9a6d6d1d2839
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that points to a redirector service. This suggests the primary purpose is to redirect the user to malicious content, likely for phishing or malware delivery.

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=influenza+vaccine+2019+guidelines
    • http://files.wendellmills.com/uploads/1/3/0/7/130776120/xojopoxos.pdf
    • http://zudugadu.shantystitchers.com/uploads/1/3/0/8/130814328/8782400.pdf
    • http://files.immaculateconceptionstmarys.com/uploads/1/3/2/6/132695698/e54e7597.pdf
    • http://files.computergeeky.org/uploads/1/3/1/4/131453917/157784.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/amazing_spider_man_2_apk_offline_mod.pdf
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/gevunebatezosujexuvelile.pdf
    • https://cdn.shopify.com/s/files/1/0436/0703/1966/files/zobirezebifejeba.pdf
    • https://cdn.shopify.com/s/files/1/0450/6419/2150/files/freaks_timmy_trumpet_sheet_music_trombone.pdf
    • https://cdn.shopify.com/s/files/1/0434/2389/1618/files/54857943677.pdf
    • https://cdn.shopify.com/s/files/1/0432/2561/2450/files/gudinoladi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0722/9597/files/36131077849.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_off0000a6fe.bin
af65fda6546bc3127e3d3cbddb226c0c106776fb93eccfba92c3e1cca39d551e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6FE 5620 bytes
font_01_sfnt_off0000ba46.bin
eb68b514e0e9f4282a930b331b92dbeb427a1b7b5016b28a5e6d51857695c242		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA46 10580 bytes

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