Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c63187a786b9465…

MALICIOUS

PDF

41.1 KB Created: 2020-08-06 19:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b27027b0a1e9f17d31e13753c02a8382 SHA-1: d4d80307b30e099c688caf12663020c17d5d9eb3 SHA-256: 0c63187a786b9465484ac14db9367bfbc9039fae2c5c53ba7e7c10edf210bd3d
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector to malicious infrastructure, disguised as a personality test. The embedded URLs suggest an attempt to generate traffic or lead users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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=quick+myers+briggs+personality+test+pdf
    • http://files.ambreepresentations.com/uploads/1/3/1/3/131379296/9839841.pdf
    • http://files.monicajlivingston.com/uploads/1/3/2/7/132740536/89455.pdf
    • http://files.mrkellymathclass.com/uploads/1/3/1/1/131164112/ce3fd.pdf
    • http://files.gurbaani.tv/uploads/1/3/1/0/131071137/1148144.pdf
    • http://files.gbea-online.org/uploads/1/3/2/8/132814073/mamelovekabudubu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3342/0195/files/7766457635.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/djpunjab_punjabi_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45560821546.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/padigabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/85731207189.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/gaveziwozejakenuxokevedel.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/vevilenita.pdf
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/build_my_life_chords_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/gasasiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/suxasijabifodolivefinisoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/lower_back_pain_exercises_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21617342462.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_off000061b2.bin
4f71a1189222bc19a2c6eecaf9f93fae89845b8130eaac7cae2afb4d043c7cc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x61B2 5840 bytes
font_01_sfnt_off00007586.bin
7e5246bd97ca7d0a59b28d5463b9f8430c732dec2b4e9739f31144ddc6d266c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7586 9924 bytes