Malicious PDF — malware analysis report

Static analysis result for SHA-256 94576b27d200dfcd…

MALICIOUS

PDF

45.7 KB Created: 2020-08-04 19:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb3902502dd178b05d364a39b8bd0481 SHA-1: 86a66db2de96c11aed6719f42663f8f856a34505 SHA-256: 94576b27d200dfcd3fdd0a5962ec1d364565fbdd448336777400136d3b0600f8
154 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, suggesting a phishing or malware delivery attempt. The document body, though partially corrupted, includes the text 'Easy popular piano songs pdf' and the malicious URL, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the final malicious destination. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious redirection attack.

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=easy+popular+piano+songs+pdf
    • http://files.emmausny.com/uploads/1/3/0/7/130739891/gukedol_zofovomozefoto_wexalek_nawen.pdf
    • http://files.hillsborosportsmedicine.com/uploads/1/3/0/8/130874246/nutumizi.pdf
    • http://files.dressagestars.com/uploads/1/3/1/6/131636990/lulitegarotin.pdf
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/vaxemofaruvizojek.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/mac_address_lists.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/repupew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/10581223940.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4820/files/58535490736.pdf
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/bmw_dashboard_warning_lights_chart.pdf
    • https://cdn.shopify.com/s/files/1/0434/2946/2165/files/4558800488.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sarozasupevukofapunaxovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/nosivete.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8277/files/pdf_annotator_free_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/52999415766.pdf
    • https://cdn.shopify.com/s/files/1/0436/7620/5209/files/wevapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0174/0439/files/cs_go_crosshair_commands.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/nawokugu.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_off00006771.bin
3abd35c8aa95aa16ce5ec399ab65dfd14bd93b04cf074a1f86df1d0b4f29bb73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6771 4952 bytes
font_01_sfnt_off00007851.bin
731e36c59de0ba983b0ae45f2b7215e6881d9bee519afa356bc77f7886a30558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7851 10344 bytes
font_02_sfnt_off00009bb6.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB6 4324 bytes

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