Malicious PDF — malware analysis report

Static analysis result for SHA-256 724610128decfbe8…

MALICIOUS

PDF

68.4 KB Created: 2020-08-21 12:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0fec21033f96e100f8c9559c3bcd6d1 SHA-1: c8996e3acc16ac09579a0e86500bd1b6ced94408 SHA-256: 724610128decfbe88fa64d20cfcef7811b3a37bbe754f4c428bec6f8a10ef7f5
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, indicating an attempt to lead the user to malicious content. The document body, though partially corrupted, contains text related to 'Utrack online gpx track report generator' and a URL that aligns with the malicious redirector heuristic. The ML classifier also strongly indicated maliciousness.

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=utrack+online+gpx+track+report+generator
    • http://files.nasrinbakheet.com/uploads/1/3/2/8/132815220/03e4b3419d34.pdf
    • http://files.heritagehighway120.com.au/uploads/1/3/2/6/132683334/9605826.pdf
    • http://files.southtahoefootball.com/uploads/1/3/1/4/131483386/1239856.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7189/6741/files/calculations_for_a_level_chemistry_ramsden.pdf
    • https://cdn.shopify.com/s/files/1/0433/5747/0870/files/chinese_characters_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/ruzagog.pdf
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/jezawabugiwivomowovu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/siwapikidosubobolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/palubajojowuzigatop.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/55119533701.pdf
    • https://cdn.shopify.com/s/files/1/0435/1311/8872/files/how_is_passer_rating_calculated.pdf
    • https://cdn.shopify.com/s/files/1/0430/8366/1461/files/11909669986.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_off0000c79c.bin
1ea9812350c23ca65d1b4ef02b5d35936e4768b6b24e1536fcb112802cfa7a02
pdf-font-stream PDF embedded font (sfnt) at offset 0xC79C 5048 bytes
font_01_sfnt_off0000d8da.bin
d4b98efd4358c20471344d5c76864eb67a6432f3da8a5917eb87844d34e60277
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DA 13664 bytes