Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f03e11b4565873…

MALICIOUS

PDF

34.3 KB Created: 2020-08-13 06:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb88c7752f2635a70d14a0eab943cf00 SHA-1: e1a0cb7e616380c0471753bf68e08d9ba46351b4 SHA-256: d4f03e11b45658737161edb6c45f4105579f1f7ad5cb7f393d62d4acf95dec5a
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an 'action verb quiz'. The ML classifier strongly indicates maliciousness. The document body and embedded URLs point to a lure designed to trick users into visiting a malicious site, likely for further exploitation or credential harvesting.

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=action+verb+quiz+pdf
    • http://files.berlinperspectives.com/uploads/1/3/1/4/131437064/bigabib_fanate_xotivipaj_tufivosewuw.pdf
    • http://files.cmstassel.com/uploads/1/3/1/4/131453007/a2d253d50444d9.pdf
    • http://files.barbershopsingers.org/uploads/1/3/1/4/131454262/bogirisi.pdf
    • http://files.newprovidencebaptistchurchparis.com/uploads/1/3/2/6/132681891/fubujuxolidonigixoze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/gekovozumelesav.pdf
    • https://cdn.shopify.com/s/files/1/0434/1507/7022/files/google_maps_setcenter.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/zirokorizirudimunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9433/4870/files/selena_gomez_slow_down_lyric.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/43775487563.pdf
    • https://cdn.shopify.com/s/files/1/0432/2154/9217/files/writing_equations_in_latex.pdf
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/56864807776.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/41837426068.pdf
    • https://cdn.shopify.com/s/files/1/0433/8820/7254/files/paulo_coelho_libros_el_zahir.pdf
    • https://cdn.shopify.com/s/files/1/0449/1057/5771/files/psicologia_que_estudia.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/denosujaguzenuzasazejew.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_off00004a4a.bin
0432dc5d3c6b0b3cf10bcc44cb8e43d4fc3dfbdd8fe8effedc4d7a9c23108901
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4A 5092 bytes
font_01_sfnt_off00005bab.bin
57cafd0eb5acb649af1edb0bdb6c8017ce8e8ad5c24fe2c0a95fd06df62a5b21
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAB 9712 bytes