Malicious PDF — malware analysis report

Static analysis result for SHA-256 753ebf0bab1594f4…

MALICIOUS

PDF

51.1 KB Created: 2020-08-09 14:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90944d62bd6064e225e287f75a51aabf SHA-1: f3e4f941bf0a61b2720e5d47cbd2b739ca17038f SHA-256: 753ebf0bab1594f4ef5b196a64f890c0b463c596d1a112dda12d27b1b8fd26bd
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Archaeology magazine 2020 pdf' and a URL that points to a redirector service. This suggests a phishing or scam attempt to trick users into downloading potentially 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/pify?keyword=archaeology+magazine+2020+pdf
    • http://femerafe.tautelab.org/uploads/1/3/1/3/131398367/terapagufepu.pdf
    • http://files.ricor.info/uploads/1/3/1/3/131380052/nuxem.pdf
    • http://files.aquabydesign.co.uk/uploads/1/3/0/9/130969888/495522.pdf
    • http://files.deltatechindustrialpark.com/uploads/1/3/0/8/130814783/nowibadebu.pdf
    • http://files.bethelfriends.net/uploads/1/3/1/4/131483603/tepuritazadi_bimikipe_zujivuvuzuvavir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/runutasuxomubixirapamaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3222/files/9722789063.pdf
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/wii_u_mii_qr_code.pdf
    • https://cdn.shopify.com/s/files/1/0427/9966/1223/files/target_return_policy_no_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/kefufomosoromulepigowemiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/zamijabojosupurej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29942388251.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/zojatirew.pdf
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/nolilasekenegirabilikox.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/nananelazafebufo.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006726.bin
beeba4578a910bad6e2488e25183091d2cd717dfdde589850de65a21a7ecb542		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 5512 bytes
font_01_sfnt_off000079b1.bin
f4e2a92ffedce1677f0ac7abd39a261c5c6bda31cc1b84ca1389d7ec65cadbe1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B1 10108 bytes
font_02_sfnt_off00009c90.bin
713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C90 16060 bytes
font_03_sfnt_off0000b122.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB122 4324 bytes

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