Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa51a0f695b64b8…

MALICIOUS

PDF

50.6 KB Created: 2020-08-24 09:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5308d458a4c536b79ec340110e2d1d98 SHA-1: 306ecaac2ec24bbafe7691afac124d1a25868c38 SHA-256: 0fa51a0f695b64b86037820ed9d30ad2edcdde96409d623e9a8ab19a7efac64e
174 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'cd case hologram template pdf' and the malicious URL. The presence of many external PDF links suggests a link farm or SEO poisoning attempt, likely to obscure the malicious intent. No scripts were extracted, but the overall structure and the malicious redirector strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=cd+case+hologram+template+pdf
    • http://rofekev.dominikaphoto.com/uploads/1/3/0/7/130738615/buvixivuto.pdf
    • http://jubexane.sushibarnagomi.com/uploads/1/3/1/0/131070767/vapetamoligugonafe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/wezutuzuzogobisivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/33675451831.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/29582090030.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/corporation_bank_mudra_loan_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/nordvpn_is_horrible.pdf
    • https://cdn.shopify.com/s/files/1/0432/1158/7752/files/nipple_thrush_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4290/files/catawiki_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/lilawapisaporoge.pdf
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/unity_light_flicker.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51268900441.pdf
    • https://cdn.shopify.com/s/files/1/0439/2560/2472/files/12661346644.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0822/files/83303423026.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079ab.bin
9c65b7d6d1f54c88301c193442abae6fabdfd59254a80a76be4abea57eda4035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AB 5224 bytes
font_01_sfnt_off00008b73.bin
21471b2e5789a2b9c005eafc8499d912156cebf223395539950d04a15a91f676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B73 10460 bytes
font_02_sfnt_off0000af39.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF39 4324 bytes

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