Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f78990a1c626747…

MALICIOUS

PDF

43.5 KB Created: 2020-08-23 05:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ba60fbcf6699667b804e47711be2151 SHA-1: 3fa42e1c209628dfd3c1ef3e49d374378c2b64af SHA-256: 3f78990a1c626747c448b7ed4609db3e51afc74f3758ed2ab3471bfc90dbc596
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a consumer report. This suggests a phishing or malware distribution attempt. The document also hosts a large number of external PDF links, many pointing to Shopify domains, indicating a potential link farm for SEO manipulation or to obscure the primary malicious destination. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence score support the malicious verdict.

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=consumers+report+cars+2017
    • http://files.coopersvilledda.com/uploads/1/3/0/7/130738681/f34cb72732.pdf
    • http://files.melissa-haskin.com/uploads/1/3/2/6/132695492/9943212.pdf
    • http://files.neboair.com/uploads/1/3/0/8/130814126/towavaru.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/belaxevofejaxabefuwubeze.pdf
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/rifelu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/kilodazoxawokaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1837/0728/files/coworking_space_design.pdf
    • https://cdn.shopify.com/s/files/1/0432/6634/3072/files/lonubiget.pdf
    • https://cdn.shopify.com/s/files/1/0438/6032/8608/files/mcgraw_hill_answer_key_science_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/30074806546.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/jowuwufibib.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2550/files/parabezunevototixinusekav.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/1080p_hd_movies_free_sites.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_off00006c93.bin
0e2b6362b1399004e7f9fd14fde597e7231092eb56e22e27d29696de6daf68f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C93 5356 bytes
font_01_sfnt_off00007eb2.bin
74076d5907eb62dbd553deb3408d90c75b398873075fd232f66bef1dc29bafd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB2 10084 bytes