Malicious PDF — malware analysis report

Static analysis result for SHA-256 14862dbccc6b2513…

MALICIOUS

PDF

45.4 KB Created: 2020-08-10 21:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e55f725b285eddb95984252f42dd86cf SHA-1: 4da793ca96781725c31efa2361fec68994ece6b3 SHA-256: 14862dbccc6b251364b0735701a70368548e2431fed8ac1dfdf969228ad5475f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Ielts speaking test criteria pdf'. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful content, likely for phishing or malware distribution.

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.com/pify?keyword=ielts+speaking+test+criteria+pdf
    • http://files.thecovecares.com/uploads/1/3/0/8/130874339/zubewafenelulimelura.pdf
    • http://files.northislandpag.com/uploads/1/3/0/8/130814531/gazis.pdf
    • http://vafumaxon.friendlifehacks.com/uploads/1/3/2/6/132682137/879379.pdf
    • http://xilabozi.conventionandeventstaff.com/uploads/1/3/1/1/131164250/nojimuxom-masebiga-zufaxusudit.pdf
    • http://files.ankionthegroove.com/uploads/1/3/0/7/130738850/tevebapozed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/sidubupa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/togegobofuxobukirowe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/vamatefagogudovutosup.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/9945572705.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7779/files/51705130138.pdf
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/rusuwezipunofimadefuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7541/1872/files/fibakedepelivedala.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/befegumive.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/113520739.pdf
    • https://cdn.shopify.com/s/files/1/0431/8511/1203/files/gixibikufozabomeledow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xidab.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_off00007466.bin
d29de3443b171b42bee56381c4922e6ed7821a702cbb8b681ee932ed7fdd52a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7466 5324 bytes
font_01_sfnt_off0000868c.bin
a80e7b20ac97ce1b1dc6635ad6c1b6260a719587d29f9c11becf786999e2850d
pdf-font-stream PDF embedded font (sfnt) at offset 0x868C 9840 bytes