Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5d0fa3227a42995…

MALICIOUS

PDF

40.3 KB Created: 2020-08-19 07:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccbe9b1af880fe751ca2a1fd4cbae116 SHA-1: f5eac3927eeac62967c191ca09ad058714634322 SHA-256: e5d0fa3227a42995c5ecb2b68277599bef48a1a362752f0fd393806fef568b95
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'machine hour rate calculation in excel sheet' and includes the malicious redirector URL. This suggests a lure to trick users into visiting malicious sites, likely for phishing or to download further malware. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=machine+hour+rate+calculation+in+excel+sheet
    • http://files.drlindseynd.com/uploads/1/3/0/7/130739190/32bc1440f.pdf
    • http://files.zephyrshoremaine.com/uploads/1/3/1/8/131871912/686be20ef1.pdf
    • http://files.bitingintothecore.com/uploads/1/3/2/7/132740362/fukozofinexep_darasizemeso_konomuvijenuwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/rowatatul.pdf
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/gibegux.pdf
    • https://cdn.shopify.com/s/files/1/0429/8362/0757/files/angular_form_control_valuechanges_on_blur.pdf
    • https://cdn.shopify.com/s/files/1/0449/0749/5591/files/bordereau_cnss_maroc.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/king_corpsman_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/chamakam_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/nalowewalonaluwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4891/0491/files/62244675370.pdf
    • https://cdn.shopify.com/s/files/1/0449/9865/6158/files/50396181076.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6183/files/widixesurabugemobetelafex.pdf
    • https://cdn.shopify.com/s/files/1/0448/0948/6498/files/product_costing_methods_in_manufacturing.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejozetopugewafapo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bovabokuvuxinapuwukiberem.pdf
    • https://cdn.shopify.com/s/files/1/0431/9333/5970/files/abnormal_psychology_disorders.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b0.bin
9e3d994a5bf9b4141a48e0a6ad8b67cdd38f271aee1c6c470e016fd6cd16c719		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B0 4960 bytes
font_01_sfnt_off00007184.bin
0dec2228ee3fafef43663e1a6cbb6aee2ea5f7aa2630c66aa1aeb57ccdef4474		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7184 10056 bytes

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