Malicious PDF — malware analysis report

Static analysis result for SHA-256 713bd319c023106b…

MALICIOUS

PDF

46.2 KB Created: 2020-08-18 22:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35ce4d02387056ded05268c94ab1c2f0 SHA-1: b22b1d235dfd854e27e96185571fb53f0c1c845a SHA-256: 713bd319c023106bb5747f38eda28911b0009bae8948edec9cd500f01aef3609
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common tactic for SEO poisoning or link farming to drive traffic to malicious sites. One of the embedded URLs, 'https://ttraff.com/pify?keyword=capitalismo+socialismo+y+democracia+pdf', is flagged as a known malicious redirector. While the document body contains garbled text, the presence of numerous links and the specific malicious URL strongly suggest an attempt to redirect users to harmful content, likely as part of a phishing or malware distribution scheme.

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=capitalismo+socialismo+y+democracia+pdf
    • http://files.tulibro915.com/uploads/1/3/1/3/131398504/lazularerir-lokogotulek-moduv.pdf
    • http://files.z-emotion.com/uploads/1/3/0/7/130740522/8261722.pdf
    • http://pamape.vignericandleopera.com/uploads/1/3/2/6/132681352/vuvifipe.pdf
    • http://vutiga.diversitypractitioners.org/uploads/1/3/0/7/130739206/8887768.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/analytical_chemistry_by_g._d_christian_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/ashrae_standards_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/21951228821.pdf
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/email_formal_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/bamarugepumutoduk.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/vowobawezozos.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/memibumemogurab.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/ammonium_sulphate_precipitation_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/duzifesozup.pdf
    • https://cdn.shopify.com/s/files/1/0450/0036/0094/files/lawesamojegewapa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2222/9397/files/deux_arabesques_free_sheet_music.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_off0000734d.bin
b11af94b4636dff5ce83e880eebc444cb3548ed74a69855e80c15a434a3aade1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734D 5308 bytes
font_01_sfnt_off0000854a.bin
17fbe28501d20d26971e7084efc9a459815ee1992a1e7f440412eee4d90c7821		 pdf-font-stream PDF embedded font (sfnt) at offset 0x854A 11336 bytes

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