Malicious PDF — malware analysis report

Static analysis result for SHA-256 e18edcfadcb18916…

MALICIOUS

PDF

39.0 KB Created: 2020-08-31 04:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eeb215f436b127e41d902c645d28f7de SHA-1: fed2814c160d5f28f0288bb75fe34d1bf56ff466 SHA-256: e18edcfadcb18916828720ca6d1182c5ba658fe14a13b4752f57c7a52389027c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'argumentative text analysis worksheet' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm heuristic further supports the malicious intent of distributing links.

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/wix?keyword=argumentative+text+analysis+workshee
    • https://cdn.shopify.com/s/files/1/0460/8625/8852/files/arithmetic_logic_unit_information.pdf
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/canon_eos_700d_manual_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97098861098.pdf
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/navifekopuvutopil.pdf
    • https://static.usrfiles.com/ugd/097bd5_23293c21fc584a008764dcb76e0468c8.pdf
    • https://static.usrfiles.com/ugd/67e251_406a103d7a174cac9f6e0f58bd2fc6ae.pdf
    • https://static.usrfiles.com/ugd/3826db_ca914581e5e545d291f0189c4b05a7b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_522641019a894c168b977696308f1137.pdf
    • https://static.usrfiles.com/ugd/837d34_465673c6d85c49c7b105523715cd7c9d.pdf
    • https://static.usrfiles.com/ugd/a76634_d40225e5fd26426f815b6187e1251596.pdf
    • https://static.usrfiles.com/ugd/724bd4_52efe0ca991f4af5b66cccb9f5a1c3b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecca063486524e0cb3f99abcde058261.pdf
    • https://static.usrfiles.com/ugd/76156b_54005887922f4dceb80741038aa309ea.pdf
    • https://static.usrfiles.com/ugd/b8c837_96bb1220464242ba9e414e2cc5540424.pdf
    • https://static.usrfiles.com/ugd/8de238_15a6709f5d884c299fecc5e283545ee1.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd6b989234fb4b62b9efc3dbff31a08e.pdf
    • https://static.usrfiles.com/ugd/a771bd_cd2263934ebe45c5afc3c76f47c322da.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058cd.bin
413683146242ba20fdaac1813c9bbf74c756239c1bad0a13bb113efbbab2c748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58CD 5476 bytes
font_01_sfnt_off00006b57.bin
07e26297fbc172ed7239e330d44ea0d00e6178ca77b9beaded265d6bd092e823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B57 10516 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.