Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce2550cd9fb36e9…

MALICIOUS

PDF

41.6 KB Created: 2020-07-24 09:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbaa632490b820b769cfca980f20f57b SHA-1: a51ba79871455482782fea258fb9f866a9f42b70 SHA-256: 5ce2550cd9fb36e9755f1547415ea33b8a7106d186503e3c68fbd6a7f450adeb
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a redirector service, which is a common tactic for delivering malicious payloads or phishing pages. The document body, though heavily obfuscated, contains keywords related to a Verifone vx675 manual, suggesting a lure to entice users to click the malicious link. The presence of numerous external PDF links also indicates a potential SEO poisoning or link farm strategy to distribute the malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=verifone%20vx675%20manual%20pdf
    • http://files.aspectratioprojects.com/uploads/1/3/0/7/130739251/fuzuxosofodo.pdf
    • http://files.farcornersmusicals.org/uploads/1/3/1/4/131406104/c4e845967d604.pdf
    • http://files.kellymansfieldart.com/uploads/1/3/1/8/131856950/6733675.pdf
    • http://files.burghyart.com/uploads/1/3/1/8/131871772/vevelu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3105/1931/files/kawukubugab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/84958371884.pdf
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/19244664634.pdf
    • https://cdn.shopify.com/s/files/1/0440/5044/8549/files/nojolupisobozifutojokamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/86279895603.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magej.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/tivafodowatewoputa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6054/3138/files/227128510.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/gifoforitogoxigog.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/gozelawuvorep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/49843924598.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6429/files/57284542494.pdf
    • https://cdn.shopify.com/s/files/1/0431/8717/5588/files/kodekifewapaluzojorokavu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/63995882831.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_off00006557.bin
30209565d0017da8122099eb198c2c624b3298846d13feb8ade7da061faa6eda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6557 5264 bytes
font_01_sfnt_off0000772b.bin
a00ef65e3fc12bf3cf60fa5307d088140860303413fc65ecc7a78333bea74356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772B 9976 bytes

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