Malicious PDF — malware analysis report

Static analysis result for SHA-256 661031aede05b06a…

MALICIOUS

PDF

43.7 KB Created: 2020-09-13 17:11:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0510305fd9654d6ebc9ffec84b0e9d08 SHA-1: e64d8bd0528d739bd7c54d5a82bcf9cd37218372 SHA-256: 661031aede05b06a7a990c97ab191078a2414d1f39c54f4d4d63b754996729cc
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.me/pify?keyword=great+clips+coupon+2020+february, suggesting a phishing or scam attempt. The PDF also contains a large number of external links, characteristic of SEO link farms.

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.me/pify?keyword=great+clips+coupon+2020+february
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c0b427_20e7a7512dd94bb7a0495c1dd7288bb7.pdf
    • https://static.usrfiles.com/ugd/804ff6_044fdf2bb8b747dda30ce309fc583c30.pdf
    • https://static.usrfiles.com/ugd/cfa91a_b3f2d8d7bd8a4fbfb49e2d8232fc47e9.pdf
    • https://static.usrfiles.com/ugd/105a8c_145e821fdb044a118cc7a2811267a469.pdf
    • https://static.usrfiles.com/ugd/77941b_98886da51e6642d0b2e4e139543fc059.pdf
    • https://static.usrfiles.com/ugd/04e6f9_ac2a0e6db4894c3fa12eac86153a8734.pdf
    • https://static.usrfiles.com/ugd/03ae60_c77c4fc948dc4d9d8c70dc80a9f21dfd.pdf
    • https://static.usrfiles.com/ugd/eaf48f_eeeec274f6e14bac94a4d61bca407a82.pdf
    • https://static.usrfiles.com/ugd/607883_07120762802742c694ca2f153bd00902.pdf
    • https://static.usrfiles.com/ugd/a86d68_1b1115b6d7014e2fb5f0f82adeefa64d.pdf
    • https://static.usrfiles.com/ugd/409ca8_7bfd0559205840d5853683233bac120e.pdf
    • https://static.usrfiles.com/ugd/30e015_1a8b681ec0f94e6d98397f04ed81c9a0.pdf
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/after_effects_tutorials_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9788/files/bryophytes_and_pteridophytes_book.pdf
    • https://cdn.shopify.com/s/files/1/0454/2119/9516/files/dudewegevobawoxinavi.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/attending_physician_statement_form_york_university.pdf
    • https://cdn.shopify.com/s/files/1/0438/5275/9190/files/rozanifivabulikovito.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_off00006a73.bin
15d9f2f92c318e197e36a346667d31bd4d527d3715660e39f9257c5fc3e7a820
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A73 5556 bytes
font_01_sfnt_off00007d6a.bin
6169c11189ee1a7e34e77a8316322ad4e0d851b16c33921d6d2f912a77cfe009
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D6A 10740 bytes