Malicious PDF — malware analysis report

Static analysis result for SHA-256 be318d1a1f6d5ac4…

MALICIOUS

PDF

44.6 KB Created: 2020-08-06 08:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: faef2bfb697f376814b9de1343c2db43 SHA-1: e3ce7f95dbc423f9a44cbaeb236de7c2a80ab344 SHA-256: be318d1a1f6d5ac4731578d333f3d6a5a069c30b18441f5512d5679ca7390de6
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented within the document body, disguised as a link to a leadership PDF. The document also exhibits a PDF link farm heuristic, with numerous links pointing to Shopify domains, though these appear benign. The ML classifier strongly flagged this PDF as malicious. The primary attack vector is likely social engineering via a malicious link embedded within the document.

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=how+to+become+a+transformational+leader+pdf
    • http://wediferot.galaxyelitesecurityproducts.com/uploads/1/3/1/4/131438539/bolelag.pdf
    • http://files.mollymcdowellactor.com/uploads/1/3/0/7/130739268/4372685.pdf
    • http://files.scottyanco.com/uploads/1/3/2/3/132302942/5949817.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/list_of_government_bams_colleges_in_maharashtra.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/css_input_type.pdf
    • https://cdn.shopify.com/s/files/1/0429/4619/9711/files/creative_sb_x-_fi_driver.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9845/files/jetufa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/train_operator_exams.pdf
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/97664606423.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/wutokuwitijasixejajagoge.pdf
    • https://cdn.shopify.com/s/files/1/0433/2834/0123/files/22724111970.pdf
    • https://cdn.shopify.com/s/files/1/0436/1574/8253/files/90101558072.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/82836897239.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/kapabexizezuxog.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3239/files/80088758966.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/67433320650.pdf
    • https://cdn.shopify.com/s/files/1/0440/7784/2597/files/jadubiberobunitugepilowi.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_off00006ec2.bin
03225b2e0d55f1b70977223755b2431b2c365b8480b713fea2e069c4eedbe23f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC2 5492 bytes
font_01_sfnt_off0000815f.bin
ecd907e7f53129416dd9d2450026f94adbf6bb4ea7b730db65c02efd26f27db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x815F 10428 bytes

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