Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb30b6cd0165b97…

MALICIOUS

PDF

45.8 KB Created: 2020-08-24 06:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 246b5fad8b9e436e6adf83bfe10dfa1d SHA-1: f7c49a368be8d81f6854d82b992a68bf41ec95a0 SHA-256: bcb30b6cd0165b97606580612811384061110273c61e80185937601debc902ac
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=c%25C3%25A1ch++video+comment+facebook'. This indicates a social engineering attempt to direct the user to malicious content. The document also exhibits characteristics of a link farm, with numerous embedded URLs, including one hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=c%25C3%25A1ch++video+comment+facebook
    • http://files.franciscolisci.com/uploads/1/3/0/7/130775645/wuxilas.pdf
    • http://pusej.alwaystherepetcare.com/uploads/1/3/1/3/131380505/c57bbb.pdf
    • http://files.cruzla.net/uploads/1/3/0/7/130740483/kufaladoweralus.pdf
    • http://pixopefug.friesenfruits.com/uploads/1/3/1/0/131069759/d4122a0b97e68d.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/96183589372.pdf
    • https://cdn.shopify.com/s/files/1/0434/3329/6028/files/treachers_collins_syndrome_life_expectancy.pdf
    • https://cdn.shopify.com/s/files/1/0434/8339/8310/files/ischemic_heart_disease.pdf
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/14347803441.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/83316779102.pdf
    • https://cdn.shopify.com/s/files/1/0464/6495/8616/files/chandrayaan_2_information_in_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0458/1346/5254/files/blood_genetics_group_practice_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/bobozafigutidepewenuje.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/xanudagobasunizupet.pdf
    • https://cdn.shopify.com/s/files/1/0432/5723/3576/files/xesalisuna.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/swot_analysis_journal_articles.pdf
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/72684844557.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/problemas_de_caida_libre_fisica_resueltos.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_off00005c30.bin
ff5c45d50d143a68a3a281b0e50b5f3a4cb86e4ee66f30f8966fc98adf3f14c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C30 5356 bytes
font_01_sfnt_off00006dc9.bin
69b407064059c901ae1165d170ea99a20bfc422dfae13a01a5ce6db381ccf07f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC9 11576 bytes
font_02_sfnt_off00009246.bin
f840317bf95390c92a2867f783c05a87c3b31e0234760b1e77f084fd9f7e17bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9246 16684 bytes

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