Malicious PDF — malware analysis report

Static analysis result for SHA-256 0191760e3fd9a4fb…

MALICIOUS

PDF

39.9 KB Created: 2020-08-31 06:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e437980dda8baa30540aa29277df693a SHA-1: 898b9079477020c38a5589ca74f5b9a08a149f90 SHA-256: 0191760e3fd9a4fb224e5e4ed38d04d9f357355ee716f7c9e7b9d923bef153d2
174 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a link farm hosted on Shopify, with one critical link redirecting to a known malicious domain (ttraff.cc). The document also impersonates a cloud document lure, increasing the likelihood of user interaction. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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.cc/wix?keyword=photosmart+6520+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0449/6372/5480/files/50441166195.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/rilodobeseb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2068/9306/files/mepajelelevorarur.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3549/files/37551316686.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/tidamulas.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/herbarium_sheet_of_flowering_plants.pdf
    • https://cdn.shopify.com/s/files/1/0436/6204/9433/files/ccsf_map.pdf
    • https://cdn.shopify.com/s/files/1/0466/5858/4741/files/39343980229.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/39882656054.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/7400168276.pdf
    • https://static.usrfiles.com/ugd/ec0c41_f06378dac57943889362419d2c0ef7fd.pdf
    • https://static.usrfiles.com/ugd/4c1554_edba5e466af74acdae6f6cb267e8a95d.pdf
    • https://static.usrfiles.com/ugd/b8c837_30af63356c804a899a100402006bec80.pdf
    • https://static.usrfiles.com/ugd/238140_6ef08ea1ae5e4fd497ed83334cdbd46d.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/mukerapa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/latojeletiziverurekabure.pdf
    • https://cdn.shopify.com/s/files/1/0460/9182/9412/files/anne_of_green_gables_musical_score.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://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b75.bin
e523d1847465e9586992ca65e9d2c6222e09aad9c5b02313686ac63fb3145798		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B75 5480 bytes
font_01_sfnt_off00005de3.bin
0645733b988c058c2a565d5d4f965ff94b3fa71edc48bf3bf4d11cda028a83d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE3 6824 bytes
font_02_sfnt_off00007058.bin
f7b257543cddc7a170daf257ec375e63330038d38878f9ab21440097e24048f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7058 9872 bytes

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