Malicious PDF — malware analysis report

Static analysis result for SHA-256 c37cc083ded4c33b…

MALICIOUS

PDF

55.2 KB Created: 2020-08-02 01:28:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d60eea80de850a15b7be4070df1dd0cc SHA-1: e52060e662ddbe9c423286494624d722eb4f2eb7 SHA-256: c37cc083ded4c33b8be81da68252b9a83316a27e3528b607ce8e787198168e3b
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text referencing 'the real housewives of beverly hills torrent' and the malicious URL, suggesting a lure to download pirated content. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous external links, many pointing to Shopify domains, indicates a link farm strategy to obscure the ultimate destination.

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=the+real+housewives+of+beverly+hills+torrent
    • http://files.mountainspassion.com/uploads/1/3/1/6/131637484/1101297.pdf
    • http://files.voiceofourangels.com/uploads/1/3/1/3/131379860/61cb48de35d8.pdf
    • http://files.mkrecord.com/uploads/1/3/0/9/130969059/rofekazu_duvirurejope.pdf
    • http://files.thebravecreative.com/uploads/1/3/1/8/131871554/c650db69e9d69.pdf
    • http://files.stitchesbylynsey.com/uploads/1/3/0/7/130738499/7513939f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78491346320.pdf
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/ruwepovosofesebisaxigim.pdf
    • https://cdn.shopify.com/s/files/1/0434/0052/8033/files/mirix.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/sutesifopanekamidodeb.pdf
    • https://cdn.shopify.com/s/files/1/0439/4385/4235/files/osha_field_operations_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/lujud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92904811518.pdf
    • https://cdn.shopify.com/s/files/1/0427/8019/7031/files/nomiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/fopasutek.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_off00008b92.bin
b975a942d5f05a15efdf3d80e3a8ccabf9990dab380123c54b25fccf9e00462e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B92 5080 bytes
font_01_sfnt_off00009ce9.bin
df1170e6c6c4127c0b3e3b580bb2b6c1c35d9b14f44976e2854a4e257ec1f7f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE9 10680 bytes
font_02_sfnt_off0000c154.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC154 4324 bytes

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