Malicious PDF — malware analysis report

Static analysis result for SHA-256 703b4dd0ab4fc62e…

MALICIOUS

PDF

68.7 KB Created: 2020-08-20 07:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f526a3a1d8d2c9249f8565368bd9b8d9 SHA-1: e71adb2ca368856e6813409716a2862718f313b0 SHA-256: 703b4dd0ab4fc62e7acb367681bda687f5d5e8a421e013676130a6cc21f84a90
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'metformin side effects erectile dysfunction' and the malicious redirector URL, suggesting a phishing or scam lure. No scripts were extracted, but the presence of numerous external links indicates an attempt to direct the user to potentially harmful content.

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=metformin+side+effects+erectile+dysfunction
    • http://zigopoz.marleysmama.com/uploads/1/3/0/8/130814328/toromasivus-gobizagumo.pdf
    • http://files.wickedgoodhenna.com/uploads/1/3/1/3/131380915/6160218.pdf
    • http://files.italybooktours.com/uploads/1/3/2/6/132681901/3316513.pdf
    • http://files.traumasensitiveyogaaustralia.com/uploads/1/3/1/4/131437363/kixabujamab.pdf
    • http://tipid.kosherwimbledon.com/uploads/1/3/1/4/131408899/wekodutu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/anger_of_stick_4_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/3246/8890/files/87301806167.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/56577527226.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/basorovaxavanof.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/55148813341.pdf
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/xadetitixodotuxisap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78046530146.pdf
    • https://cdn.shopify.com/s/files/1/0434/2163/0631/files/2019_calendar_2020_printable.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/48205616088.pdf
    • https://cdn.shopify.com/s/files/1/0430/7494/5184/files/fasepumud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/jubujowapatezig.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/27405517226.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/60002992446.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/zineru.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba41.bin
66b785e59187c645ea600819dc948e8beda697be77c3af316f38335db684fb92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA41 5064 bytes
font_01_sfnt_off0000cb78.bin
740c431207f05dbe301583ef2323bd46af4182a7e9bd0ec5e8fcec55a7476e13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB78 10708 bytes
font_02_sfnt_off0000f072.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 16060 bytes

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