Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfce6e668daf4877…

MALICIOUS

PDF

38.8 KB Created: 2020-08-18 23:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05d6c6c90d73877758b967d9ef4f6aea SHA-1: 7eeefaa90d35cbd51df97bb3d940bd3140874d15 SHA-256: bfce6e668daf48770f6065a065cb8920b67d6111334df66d558c93a9ebd8c841
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm. The primary malicious URL identified is `https://ttraff.com/pify?keyword=chinese+to+english+pdf+translate`. This pattern indicates an attempt to lure users to a malicious site, likely for phishing or to download further malware. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=chinese+to+english+pdf+translate
    • http://files.bigobikeshop.com/uploads/1/3/2/6/132683070/dajufinovokesifomer.pdf
    • http://files.diagnosingdifference.com/uploads/1/3/1/3/131384429/zelumowaw.pdf
    • http://files.shendramaclub.com/uploads/1/3/0/8/130813428/mezafipuloxajuw-viwaxikivopiwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/61074072107.pdf
    • https://cdn.shopify.com/s/files/1/0433/8601/1813/files/rotation_matrix_2d.pdf
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/loxakorulufijeka.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/alloys_pogil.pdf
    • https://cdn.shopify.com/s/files/1/0450/3424/2198/files/ncert_books_class_11_and_12_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/31723452646.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/fbla_middle_level_competitive_events_study_guides.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/28625284538.pdf
    • https://cdn.shopify.com/s/files/1/0448/6434/0130/files/swtor_space_combat.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/89884407650.pdf
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/26480699779.pdf
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/xanuvuxevavez.pdf
    • https://cdn.shopify.com/s/files/1/0437/0972/6870/files/periodic_table_definition_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0431/1321/8210/files/guxinifix.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/whirlpool_dryer_repair_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ddd.bin
d5689c5c6762f9b6306e2c8df03774f7f7781bb6bdcce11d8d944149045f74aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDD 3688 bytes
font_01_sfnt_off00005ae2.bin
7a5fcde15ebf8e0a251a03a95d64303a45367268d72c29e80e91cbf68c71599a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE2 5208 bytes
font_02_sfnt_off00006c8b.bin
fb11fc8a1402dfd18a6e3ab5b69d99cb3bb6e8e82f40391c9bdb87819e9c046a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8B 9264 bytes