Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e98089f51f7c83…

MALICIOUS

PDF

60.1 KB Created: 2020-08-23 16:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a9d018062bfa6b0b0c4ea741578785a SHA-1: 269ff9d1206351fe2a84467c212cf39eb01e19ce SHA-256: 01e98089f51f7c83e00bdf9ca834fd30ab243495f6f5b0d63767ced827df0307
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to this redirector. The presence of numerous other links to PDF files hosted on Shopify suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=xiaomi.+eu+miui
    • http://files.holyapostlesmitchell.org/uploads/1/3/0/7/130739740/4121339.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gofifarigomikidapowokov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/2218982748.pdf
    • https://cdn.shopify.com/s/files/1/0428/5677/5839/files/jepizibonused.pdf
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/rossetta_stone_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/93875010341.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38461358607.pdf
    • https://cdn.shopify.com/s/files/1/0437/2057/3082/files/bse_odisha_9th_class_math_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/1164/3304/files/case_files_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/xudowarokidegawewetesuje.pdf
    • https://cdn.shopify.com/s/files/1/0437/7945/7175/files/anticholinergic_drugs_classification.pdf
    • https://cdn.shopify.com/s/files/1/0457/0261/1100/files/income_guidelines_for_south_carolina_medicaid.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/jabariya_jodi_movie_moviescounter.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/present_perfect_tense_exercises_multiple_choice.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/xijukufijagetinabita.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000783d.bin
2ce5a7286efefc5aae27ce1c31b3347e159d00bd30cf97f509a0b7f7d49caffb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x783D 6440 bytes
font_01_sfnt_off00008832.bin
2815d17fbf0eca8984e91d1e3e5534679d0ff6ff568c98a60d95d2fb9b6c9426		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8832 4532 bytes
font_02_sfnt_off00009781.bin
b9f0f7f35ee9de7228c4323b15930fe3794bf3200069b0bbe9fec4d36db4f424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9781 2128 bytes
font_03_sfnt_off0000a175.bin
9687c1dec1754e022874b75f674123b2cb1ec0df1da58c74983c918d84c836fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA175 14380 bytes
font_04_sfnt_off0000ce3d.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3D 16036 bytes

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