Malicious PDF — malware analysis report

Static analysis result for SHA-256 47428eae4e76a316…

MALICIOUS

PDF

43.7 KB Created: 2020-08-19 11:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4a95c34d626952b0c508bbc511d2b11 SHA-1: 59cb1e41b5b3bef86b7d6a29910ed0b307b0da45 SHA-256: 47428eae4e76a31658a413d9c2f03e70d468403fb2bae12c8894f8283c18e608
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=good+and+bad+leadership+qualities+pdf'. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL.

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=good+and+bad+leadership+qualities+pdf
    • http://jutadin.christinaperritt.co.uk/uploads/1/3/2/7/132712358/9438053.pdf
    • https://cdn.shopify.com/s/files/1/0433/5026/1911/files/92359907981.pdf
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/benalmadena_street_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/3951/4015/files/nilafimeke.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6690/files/85502837553.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/kebubuguromikakezarobama.pdf
    • https://cdn.shopify.com/s/files/1/0432/4645/2899/files/networking_basics_interview_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8656/files/kevin_gates_90_days_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/8509/3272/files/35548161093.pdf
    • https://cdn.shopify.com/s/files/1/0432/7954/8574/files/xixofenokajelujatotof.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/fokanesizapiluzonugopu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/hagerman_national_wildlife_refuge_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0445/7637/4948/files/adriana_santana_nunca_foi_sorte.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/adverb_worksheet_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/tixejuxuzifesazulax.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/
    • https://cdn.shopify.com/s/files/1/0431/5453/8656/files/kevin_gates_90_days_download

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cc2.bin
f10352636d8407c5c41d23a280bcabd3ab27fe28f189143452da8681532a3cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC2 5428 bytes
font_01_sfnt_off00007f31.bin
96222337ae72f31f8acee060af683f333f70317e924d177c4d507484a594b260		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F31 10036 bytes

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