Malicious PDF — malware analysis report

Static analysis result for SHA-256 80386dbf423106e7…

MALICIOUS

PDF

56.5 KB Created: 2020-08-15 04:42:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fc945b4a211ab2da110ff725bb43bbd SHA-1: 771536b19253af146545d448b3ee6ed2902d3763 SHA-256: 80386dbf423106e745c05260e741e09e107f599d635ac2d69958fb72717f299e
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a game guide, likely to disguise malicious intent. The presence of numerous links to external PDFs, including benign ones on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility of 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=osrs+fossil+island+wyverns+guide
    • http://zuxefo.jamieroeske.com/uploads/1/3/0/7/130739289/gorefez.pdf
    • http://files.bentnotbrokenscoliosis.com/uploads/1/3/2/6/132681885/2425351.pdf
    • http://wevova.swisswildlifeartist.com/uploads/1/3/2/6/132696212/loteziba-mujukagage-bidowobidebufu.pdf
    • http://belaw.healthexinternational.org/uploads/1/3/1/3/131398003/36ccfb.pdf
    • http://guxif.pegsandsplines.com/uploads/1/3/2/7/132712593/3771845.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/29318321699.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2545/files/dell_latitude_e6440_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/3951/4006/files/too_much_dick.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/conversions_worksheet_year_6.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/54335320232.pdf
    • https://cdn.shopify.com/s/files/1/0434/7691/0242/files/categorical_data_examples.pdf
    • https://cdn.shopify.com/s/files/1/0440/6696/3621/files/9758390436.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/zifatapanelapupezefugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2187/6899/files/microsoft_office_2019_for_mac.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000878e.bin
47d62d92fe2e64dd4d0acf7e049eb7508acf90bb42f4455478e7f84be1aa1b18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x878E 5356 bytes
font_01_sfnt_off000099eb.bin
77cddc0909c599875951568e803139d7e41af91e427afa9f65d895e93557f7b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99EB 10948 bytes
font_02_sfnt_off0000bf59.bin
a1804fab7033f1d251fb29e732c1b9641fb316f4dad76a6f11c561d626689051		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF59 16088 bytes

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