Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0569d5a216071d…

MALICIOUS

PDF

46.9 KB Created: 2020-08-15 02:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d80d88282d9553f09ec80bc09891f6ad SHA-1: 308be6bc952c7d908024fc1d2a3a037ce633a544 SHA-256: be0569d5a216071d775d6cf20c4e8ab28302489d9442dc554dc5cabbeb627d1a
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL. The PDF_SEO_LINK_FARM heuristic indicates the presence of numerous external links, suggesting a link farm for SEO manipulation or to distribute malicious content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file.

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=family+circus+hd+video+songs
    • http://guxuj.assetsprotectionservices.com/uploads/1/3/2/7/132711991/sarisarajipekipodafe.pdf
    • http://files.bsmcmilehighchapter5280.com/uploads/1/3/2/6/132681342/8028670.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/english_textbook_grade_10_cbse.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/41741701543.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5311/files/46320415735.pdf
    • https://cdn.shopify.com/s/files/1/0437/7768/7706/files/naming_of_alkyl_halides.pdf
    • https://cdn.shopify.com/s/files/1/0438/4355/1392/files/oxford_bookworms_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8735/files/revelation_online_swordmage_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8890/files/fezebulefege.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/68580600263.pdf
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/2281917652.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/38510241962.pdf
    • https://cdn.shopify.com/s/files/1/0428/6509/8918/files/v3rm_f3_copy_backpack.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/43142146054.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fc2.bin
bd15dd40fcbde03c27fd7fc1c02f6c9860e7f70f75412cf691ec8e9e79d77f80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC2 5468 bytes
font_01_sfnt_off0000623b.bin
bcd68210be6b5532219b039164f8f27af6c3a2a11a944864b929502a1cbebce9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 5056 bytes
font_02_sfnt_off000073de.bin
f38070626f79ef1367b9f707cb9ffe4a3aa48116ab2b6d846625b669b0ddece4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DE 9852 bytes
font_03_sfnt_off000095c5.bin
6ca592e7c61d5a4785afaf2d82f9bcc9ed468f8db4debcb02af0ceef27e2a3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95C5 17488 bytes

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