Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde6050f4ec7aa36…

MALICIOUS

PDF

47.7 KB Created: 2020-08-26 03:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd6d5eed56081bcaf00ad28b0ae7ce4c SHA-1: 4ccbcb616ccadb7d9ddeae2c3d28ec05a1b0cf91 SHA-256: dde6050f4ec7aa367917e1fa71d90b7772f4cbc6f61d255101bcda7da957f6dd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high density of embedded links, many pointing to a redirector service (ttraff.cc) and a link farm hosted on Shopify. This suggests a phishing or scam campaign aiming to drive traffic to malicious sites. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the ability to determine specific payload delivery or persistence mechanisms.

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.cc/pify?keyword=heart+of+a+dog+bulgakov+pdf
    • http://files.ancestorsinmyattic.com/uploads/1/3/1/4/131408930/fogetiwilof_pudamudubum.pdf
    • http://pidigu.nancyfarmerwebsite.com/uploads/1/3/1/0/131070786/losiwefo.pdf
    • http://vitupe.imagesbya2zphotography.com/uploads/1/3/2/8/132814476/lisotefutoderej-xegetozewug.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/vogijedaz.pdf
    • https://cdn.shopify.com/s/files/1/0454/9849/9224/files/polojidejaxovu.pdf
    • https://cdn.shopify.com/s/files/1/0460/1665/9623/files/agilent_33220a_function_generator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/9679/1456/files/treatment_of_subclinical_hypothyroidism_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/3379/5477/files/cambridge_english_prepare_level_1_student_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/48512320041.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/pazuderuxusovinep.pdf
    • https://cdn.shopify.com/s/files/1/0433/7752/4888/files/kpmg_survey_of_corporate_responsibility_reporting_2013.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/32723074998.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5201/files/18721596114.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3149/files/challenging_calculus_problems_with_solutions.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007186.bin
e96310bf617520a99908c3cc056493c670c8e0b5fe21fc9e28647b608e83d733		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7186 4984 bytes
font_01_sfnt_off00008292.bin
b5af11c3a4bf0e16a8de523acc222c0d71a77a3515400fc79b92c9baec97330d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8292 9632 bytes
font_02_sfnt_off0000a38f.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA38F 4324 bytes

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