Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe99780ab34e811…

MALICIOUS

PDF

47.5 KB Created: 2020-07-29 04:00:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e95eba89adf44ba2a4854002005eefad SHA-1: 30b3e270c2f10e12f3b9725532368767d25472cc SHA-256: fbe99780ab34e81180504576bd00c4999fd7906587f34333b5199767b0b03112
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a seemingly benign Shopify URL. The document body is heavily obfuscated and does not provide clear textual clues, but the presence of numerous external links, including a known malicious redirector, strongly suggests a phishing or malware distribution attempt.

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=baileys+irish+cream+nutritional+information
    • http://files.russellflea.ca/uploads/1/3/1/0/131070161/f601465d6d20.pdf
    • http://files.selffound.net/uploads/1/3/2/3/132302711/sodikowalob_rerakovebogepuf_wulofelajeg.pdf
    • http://files.stylistpang.com/uploads/1/3/1/8/131872178/gezazudagisa_jepujuxevasek_kefaxutamezegu_fefibuvupuvoke.pdf
    • http://files.ms-j.org/uploads/1/3/1/6/131637108/520306.pdf
    • http://files.letspaintarabic.com/uploads/1/3/1/3/131379612/22ab9b14a11.pdf
    • http://files.stylistpang.com/uploads/1/3/1/8/131872178/gezazudagisa_jepujuxevasek_kefaxutamezegu_fefibuvupuvoke
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75320426607.pdf
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/sofawowezururojef.pdf
    • https://cdn.shopify.com/s/files/1/0428/7217/6796/files/zasob.pdf
    • https://cdn.shopify.com/s/files/1/0439/2956/7387/files/subipelowunokadav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/davunaxejapezuxipuwuwozom.pdf
    • https://cdn.shopify.com/s/files/1/0438/0521/2832/files/dugigatixoxemabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51268900441.pdf
    • https://cdn.shopify.com/s/files/1/0429/8981/3909/files/zeser.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/95361383731.pdf
    • https://cdn.shopify.com/s/files/1/0431/2183/6193/files/xudegalesupofuwamaga.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/41798260133.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/10342785983.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_off0000741b.bin
796e978a63b100cc9b2b2d21aae40a10d84e7c7ac62ea1b78c56a8e8ee23099e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741B 5156 bytes
font_01_sfnt_off00008573.bin
9d47c888f6a20ac131123ff5a67a05f86af3c7101f71f9a9d4af480ebed2d76c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8573 13488 bytes

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