Malicious PDF — malware analysis report

Static analysis result for SHA-256 633188bac4b8aa8a…

MALICIOUS

PDF

34.8 KB Created: 2020-08-10 08:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c785603cbd06711da2e1b9e8ec0e71c SHA-1: 360bcd5a578047bacfeb4fa151518c88fc50b0a3 SHA-256: 633188bac4b8aa8a5f696994ff9285cd9c55739fefa723985ddbc96c250baa35
154 Risk Score

Malware Insights

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

The PDF contains a deceptive link presented as a Bible download, which redirects to a malicious URL. This indicates a phishing or scam attempt designed to trick users into visiting potentially harmful sites. The ML classifier strongly supports the malicious nature of this PDF.

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=telugu+bible+pdf+file+download
    • http://wofirow.cassinsackett.com/uploads/1/3/2/7/132741555/ae5f7f14e326.pdf
    • http://pomoxijo.lake-of-dreams-campground.com/uploads/1/3/2/8/132814930/tupelatolep.pdf
    • http://files.firstnewark.com/uploads/1/3/0/8/130874120/7381583.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/50845528285.pdf
    • https://cdn.shopify.com/s/files/1/0431/9707/1524/files/zopadiseratagagenokojixej.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/smash_bros_dojo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/40279320790.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/20981003504.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/senerega.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/survey_of_accounting_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/0991/6576/files/automatic_transmission_types.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/85140454142.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/26997942656.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pinabazebovo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sejil.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6625/files/notatitimaluzibamak.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_off00004b1f.bin
873776714b54f6297f0e8e10e3de27a3b2ce4815b19ae167fac1053302c8b3c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B1F 5116 bytes
font_01_sfnt_off00005cb1.bin
b5aea410cb8b06abc69f08fb5ab3fc9eae2d8c573475432e013d3047260e1eb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB1 9816 bytes