Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ad02576798162c…

MALICIOUS

PDF

46.1 KB Created: 2020-08-06 00:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d34c5b61985af46aa2a407d77a862b6 SHA-1: 6c71e5c8d9d57acff20f02ec58adf415893ad127 SHA-256: 83ad02576798162cd803ad7dcc4b3553937338aa7daf6709135478f7b5e7fe18
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure users to a compromised site. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed for malicious redirection.

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.com/pify?keyword=john+tukey+exploratory+data+analysis+pdf
    • http://files.hcbmusic.com/uploads/1/3/0/7/130775714/nilinujewutefik.pdf
    • http://files.ncclosingattorneybestpractices.org/uploads/1/3/1/3/131378780/1324396.pdf
    • http://zakok.lascolinaspsych.com/uploads/1/3/1/3/131383657/bujolaf_nujibugepizi_nekexajujakig_kawixiladiw.pdf
    • http://furalubi.mattclifforddesigns.com/uploads/1/3/2/6/132695492/504edee33b.pdf
    • http://files.cmaretreats.com/uploads/1/3/0/8/130874254/negipa_voxamixu_tesube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/97586918719.pdf
    • https://cdn.shopify.com/s/files/1/0437/6127/0935/files/ode_to_joy_violin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rosetotirumeza.pdf
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/mad_world_gears_of_war.pdf
    • https://cdn.shopify.com/s/files/1/0449/4006/6971/files/install_elasticsearch_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/zomonilutibumenodifi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/elementary_probability_theory_chung.pdf
    • https://cdn.shopify.com/s/files/1/0437/0189/5322/files/21750184909.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6556/files/gubujadoxuzexelebodi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3117/files/zemexake.pdf
    • https://cdn.shopify.com/s/files/1/0430/0596/8537/files/millionaire_next_door_summary.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/53071965139.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/simopowonedoratosatixe.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_off000074f6.bin
e242d578f5d038c6f1f54c150e83084a8a2a6874db3d8f33096a0ff79889840d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F6 5352 bytes
font_01_sfnt_off00008732.bin
14af05a207883bbeb98680467fc55af0810a85316021a3f8212763eee03d2ec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8732 10456 bytes

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