Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd65a44efaad4e88…

MALICIOUS

PDF

66.2 KB Created: 2020-08-21 17:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e020dc083d3bd9389263ffb2ee174d87 SHA-1: 9c864c99b732238a666f9cbd5ab6e98ead48d8d0 SHA-256: dd65a44efaad4e8858f4ab7572a2a927207d0c5a551d2da16d6c446e0c36cb02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=1979+cessna+172n+poh+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links hosted on Shopify, suggesting a link farm or SEO poisoning tactic to disguise the malicious intent. The primary goal appears to be redirecting the user to malicious infrastructure.

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=1979+cessna+172n+poh+pdf
    • http://files.babalini.com/uploads/1/3/2/6/132683135/votafolemav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/gixixuxepifepaxefu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9382/6463/files/luvomoxuxorodavew.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/toxagusiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/77891213199.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/checkbox_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/melebenudowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8103/1064/files/mukijolagajalezup.pdf
    • https://cdn.shopify.com/s/files/1/0437/5999/2990/files/taberukevimome.pdf
    • https://cdn.shopify.com/s/files/1/0434/8048/1954/files/roots_prefixes_and_suffixes_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/lunilabuxekanujiwoletet.pdf
    • https://cdn.shopify.com/s/files/1/0435/1043/1896/files/gowukak.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3308/files/62799483887.pdf
    • https://cdn.shopify.com/s/files/1/0437/6576/0151/files/befamavewifawuzin.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c161.bin
bd3392d69ab1e625ec4123debd1cc533b5eeaeb00ec269690c9920f79762f564
pdf-font-stream PDF embedded font (sfnt) at offset 0xC161 5440 bytes
font_01_sfnt_off0000d3e1.bin
a370101ab15371bb9f3bd103715e806365b734cdeb2ed7bf7f0dfdfdedbab565
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E1 12132 bytes