Malicious PDF — malware analysis report

Static analysis result for SHA-256 7718bb9055bcc03f…

MALICIOUS

PDF

54.6 KB Created: 2020-08-21 19:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8530db23eb8e450e4c38a1826cdf0b7 SHA-1: 6a17e290db1c0e81a69561adcd6fb623eac9609e SHA-256: 7718bb9055bcc03f712790e0188d89084b4b882b50836c8cd7b0f7cff649a14a
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a download for free educational presentation templates. The ML classifier strongly indicates maliciousness, and the presence of numerous external links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the primary malicious activity is the redirection to a harmful URL.

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=free+ppt+templates+education+theme
    • http://files.hannahmdesign.com.au/uploads/1/3/1/4/131437446/buwevujo-bimojan-tenawakupewi-toginipemog.pdf
    • http://rupomod.careyscommunications.com/uploads/1/3/2/6/132695744/mozowir_rakorawaru_satulimaraji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/c_programming_with_arduino_warwick.pdf
    • https://cdn.shopify.com/s/files/1/0433/0956/4068/files/fakofata.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/71336285240.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/litifirokatoxufopigamutum.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/investor_relations_best_practices.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/68081829440.pdf
    • https://cdn.shopify.com/s/files/1/0435/0859/6900/files/c_static_method.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8266/files/poxidegobupipitomebegat.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6517/files/vim_set_tab_to_4_spaces.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/3421015488.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_off00009983.bin
ccdcc2efa5310711aab3bea103bfbfd09e180e693390c59704c2e3be93a62ac4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9983 5268 bytes
font_01_sfnt_off0000ab31.bin
d4bd52c36f07032986b5ab494623c678c95d6999ef34a8186c10c935febb3a84
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB31 10060 bytes