Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3aff16e0563e08…

MALICIOUS

PDF

32.4 KB Created: 2020-08-17 00:58:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed4a9b72eb8032d462a545904166f84c SHA-1: fce604ed829145bcf306c740648c4ebba08e3608 SHA-256: 2e3aff16e0563e087f8aa3381db596e5e414890ad6fe6834eebc59961917347e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and other Shopify URLs, suggesting a link farm or redirection strategy. 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=chaosium+character+sheet
    • http://sugawibed.eastlondonsuffragettes.com/uploads/1/3/1/0/131071252/xufevi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/active_citizenship_journal.pdf
    • https://cdn.shopify.com/s/files/1/0439/7550/8126/files/curriculum_vitae_europeo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/jerokaki.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/66617900466.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1637/files/rabobojofirujuvikazijab.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/xirumoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/7420/8415/files/zujamimapazetonakebimuxod.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/english_alphabet_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0463/0672/1957/files/kufipejataxalelutakobut.pdf
    • https://cdn.shopify.com/s/files/1/0430/6852/2657/files/examples_of_injective_functions.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/1324461514.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/kulisu.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_off000042fe.bin
23c28cfbb465fda59b721998bf5b91712fdf1006d3e0ab2dfba279bbd0a6bdac
pdf-font-stream PDF embedded font (sfnt) at offset 0x42FE 4912 bytes
font_01_sfnt_off00005385.bin
5803d614ae1b3ca85dad078c42e9671d90e4bccdd20ce8c3e863f49f5c1c71ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x5385 9400 bytes