Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e98cf605d315752…

MALICIOUS

PDF

41.8 KB Created: 2020-08-22 05:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42766debc6cce4752f96e6363bc490c4 SHA-1: ff83fafc6ffbc6e8c8d27c4bdaeecf3d48fcb7bf SHA-256: 0e98cf605d3157525d0f756dae8c9fde817b05c59f6cb6d0caf2717b00934579
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to what appears to be a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/pify?keyword=mysql+server+guide', is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=mysql+server+guide
    • http://xodovo.lowcountrygiftedminds.com/uploads/1/3/0/8/130814297/5232029.pdf
    • http://files.thomashossie.ca/uploads/1/3/0/9/130969565/bexibewokul_fuxixatafatol_guzemebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7344/4767/files/3409714269.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9094/files/types_of_cohesive_devices_and_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2667/files/functions_and_procedures_in_sql.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/ghatna_chakra_vdo_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/61880589946.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/vowovokuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0843/4077/files/48929762385.pdf
    • https://cdn.shopify.com/s/files/1/0434/9237/6741/files/fjalor_ekonomik_anglisht_shqip.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/dafulububiju.pdf
    • https://cdn.shopify.com/s/files/1/0431/0990/8637/files/21203302518.pdf
    • https://cdn.shopify.com/s/files/1/0431/7937/6798/files/5609997505.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/botuzimotosena.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_off00006578.bin
7b0d8aacf37cbfd1ae7be4c43bbedf3bdb352e589928ca312c073e61deb15b8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6578 5076 bytes
font_01_sfnt_off000076d6.bin
0e52be64f6c7aab1c6fdbceea3bb2984bc5309a193397e64922fa90a3555fd75
pdf-font-stream PDF embedded font (sfnt) at offset 0x76D6 10468 bytes