Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf86ea3f3087d59…

MALICIOUS

PDF

67.7 KB Created: 2020-08-09 16:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4d3ce91e61ef9d8cdd392a7743175fe SHA-1: 4ea3213eb3884a9a6be5cc2091494f6da15d8153 SHA-256: 0cf86ea3f3087d592ed2e78475934b2b8b9912f0eb19a0c7f2fada20a5f2f67e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a lure for "current affairs weekly pdf 2020". The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful 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/pify?keyword=affairscloud+current+affairs+weekly+pdf+2020
    • http://files.ghsmustangvolleyball.com/uploads/1/3/0/7/130738548/3212141.pdf
    • http://naliwax.911spotme.com/uploads/1/3/1/0/131071164/jufonad_toguwerefa_sibujigib_bezisagali.pdf
    • http://files.filmsolo.org/uploads/1/3/1/3/131379118/gugafujodaz_pezaj_pazasidamun_sofamo.pdf
    • http://files.alyssamichele.com/uploads/1/3/1/4/131437464/d5a6830a74ef5.pdf
    • http://files.navy101.com/uploads/1/3/0/8/130874110/3858634.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5679/9648/files/zavawolilunimej.pdf
    • https://cdn.shopify.com/s/files/1/0437/8230/7989/files/18348815210.pdf
    • https://cdn.shopify.com/s/files/1/0440/3871/7605/files/81228967964.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/tedanogalukorokexawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5094/3135/files/jifenedowasobim.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/54078021449.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/desoxuzabebunemamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8525/0216/files/97529050671.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6421/files/macrovascular_complications_of_diabetes_mellitus.pdf
    • https://cdn.shopify.com/s/files/1/0435/6594/0904/files/dogoxux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/33494373915.pdf
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/simple_hangman_java_code.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_off0000ca34.bin
1813871b099c596bde65d94cfcdb6a59d62cc465e3e2603f7f0200d13bc08d16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA34 5668 bytes
font_01_sfnt_off0000ddb0.bin
a9bb519522c9ce9e6848546cb500664717d6e52a94381c1114d43bf6fe583471		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB0 10548 bytes

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