Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a07f7406e5f438b…

MALICIOUS

PDF

40.7 KB Created: 2020-08-22 07:11:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed1476bd07b25a821231d4fb8b9b90a5 SHA-1: 0fc053f27332e3442860e7c413864005fb05b0b2 SHA-256: 0a07f7406e5f438bf8c2fa7b1938e18fa7f60d0ae28324d48b1487282bbc7a8c
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate documents, but one of the primary links redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=fitbit+charge+3+manual+pdf, which is flagged as a malicious redirector. This suggests a phishing or scam attempt using a lure document to drive traffic to malicious sites.

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.ru/pify?keyword=fitbit+charge+3+manual+pdf
    • http://files.cavgolf.com/uploads/1/3/1/4/131437064/e3ecb9c207552d7.pdf
    • http://files.mcminnvillematters.com/uploads/1/3/1/6/131636700/5694674.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/clinical_pharmacy_and_therapeutics_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/funeral_service_template_uk.pdf
    • https://cdn.shopify.com/s/files/1/0440/4248/5910/files/polygons_angles_and_parallel_lines_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/bixujapotosozevavig.pdf
    • https://cdn.shopify.com/s/files/1/0437/6281/1031/files/amharic_afaan_oromo_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1158/files/50719003989.pdf
    • https://cdn.shopify.com/s/files/1/0440/6693/0840/files/77552036820.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/kuranikemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/48299011157.pdf
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/asterix_bengali_comics_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/79867300468.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/mcq_on_antigen_and_antibody.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_off00005f4a.bin
fdf46b4b427504b803f69589e431887aaaba891a2800d72293f6bdd5b5616433
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4A 5652 bytes
font_01_sfnt_off00007258.bin
d639cb09d5a6d929a2f0bac068082a0bdd3b5fad9d09912d1f547bd8e5299ed3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7258 10312 bytes