Malicious PDF — malware analysis report

Static analysis result for SHA-256 beda3d20735653fd…

MALICIOUS

PDF

41.6 KB Created: 2020-08-01 17:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f309dbc3644161a51ea56a3b9cd0823 SHA-1: 023e54cfc45141730cb3e1f1f06a0462498bc5fd SHA-256: beda3d20735653fdb834d80650d2ddbf45c991cb8e6eee99460ed1572f0fd40f
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=rekey+schlage+deadbolt. The document body contains garbled text but also includes the malicious URL, suggesting an attempt to lure the user into clicking it. The ML classifier strongly indicates maliciousness.

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.ru/pify?keyword=rekey+schlage+deadbolt
    • http://files.feralcatrecoverycentre.com/uploads/1/3/0/7/130776241/benopop-lufevonoxos-rabudepotelule-notebuxavapiw.pdf
    • http://files.joanobeirne.com/uploads/1/3/0/9/130969889/furenibupa.pdf
    • http://files.miriamfields.net/uploads/1/3/1/4/131454560/luwezese_tojabubifonawup_kunevoteg_minisezu.pdf
    • http://files.thomasread.org/uploads/1/3/1/4/131437307/lomam.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/42237488261.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/zunijimekesakaz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/92490378119.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/57916901555.pdf
    • https://cdn.shopify.com/s/files/1/0432/8525/0216/files/79599042733.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0433/2702/9400/files/vazepujepaxosumi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/72438278193.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/lagufexanito.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/wuwuvolodufew.pdf
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/solved_renderitem_autocomplete.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/86254086984.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_off00005874.bin
029b7c47766d70bfe6ad162042a81945300b1e2a16d085ab832eaadd5202eebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5874 5052 bytes
font_01_sfnt_off000069b9.bin
102abf1c1e262bb86d20532aad397e46b1bf52f3839be861172f27b221207211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B9 9964 bytes
font_02_sfnt_off00008bdb.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDB 4324 bytes

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