Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a53af06b16f57c…

MALICIOUS

PDF

59.9 KB Created: 2020-09-01 05:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d862bf1c0a8ec54604aab8a7807534b SHA-1: 42ab48e65204f85d5ef65f5c9823dbf77451504e SHA-256: 14a53af06b16f57cb6e10962745a98a736194fd4d778dc5daebd208d4d3abd72
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lure the user into clicking it. The document body, though heavily obfuscated, contains text related to a 'certificate of professional competence', suggesting a social engineering pretext. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, further supporting a malicious intent.

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/wix?keyword=certyfikat+kompetencji+zawodowych+ksi%25C4%2585%25C5%25BCka+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_25905f369a5344ee9f6c6aa81377c426.pdf
    • https://static.usrfiles.com/ugd/c1108c_f7fbd84274704dc19e4114d9c86cbdbf.pdf
    • https://static.usrfiles.com/ugd/97aff7_b3c8f9b4fea84024b769a971d103c991.pdf
    • https://cdn.shopify.com/s/files/1/0430/1619/2153/files/38021833731.pdf
    • https://cdn.shopify.com/s/files/1/0460/1289/1297/files/comprehension_exercises_for_class_7_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/25435628076.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/best_mods_for_skyrim_special_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/91871441163.pdf
    • https://cdn.shopify.com/s/files/1/0430/0174/1463/files/soporozadawadelakozeremu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8764/3302/files/descargar_pokemon_x_para_pc_sin_emul.pdf
    • https://cdn.shopify.com/s/files/1/0465/0939/2030/files/health_the_basics_rebecca_donatelle.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/45978652033.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dcae3f53e624f2aa444ceba4c10c12f.pdf
    • https://static.usrfiles.com/ugd/d5415a_f22509e16e864531bf430f4948087283.pdf
    • https://static.usrfiles.com/ugd/badafb_ef32084299dc4648a179fb98e0cec1a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2905813d1b94269b7e4016a43023e5c.pdf
    • https://static.usrfiles.com/ugd/a8ca0f_04c0260ecc234bbaa19087ac373bcae4.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000082c3.bin
fad79edd0e0d96a44e07fd76711b5aed6323b755887efd5a46cffe69a89b0ae1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82C3 3184 bytes
font_01_sfnt_off00008e19.bin
67fe84c3dfa2340197e79447b459b10778fac509927bf1d72d150d9a43db344c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E19 5896 bytes
font_02_sfnt_off0000a177.bin
d2f167834ddb542be5b58047a4340e7123f8ccecd08a3ca3fd1a6e2e09dc050e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA177 15868 bytes
font_03_sfnt_off0000d0d6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D6 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.