Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12a516250e8a93f…

MALICIOUS

PDF

50.5 KB Created: 2020-08-21 11:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea5e59bf0fdfe127aae6c165a3b72644 SHA-1: ad2eef88855ccf178ad04352abee3d4dfd71648f SHA-256: d12a516250e8a93f5cca0b5f7abc9617c8d9e3b0d9342bc0cb8220efa528d7d8
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to manipulate search engine results, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=performance+appraisal+comments+examples, which is flagged as malicious. This suggests the document is a lure to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=performance+appraisal+comments+examples
    • http://feferiku.homedefenseshow.com/uploads/1/3/0/8/130874431/sifesoluke.pdf
    • http://files.globalqualityenglish.org/uploads/1/3/1/3/131398555/1f8eefe7f516.pdf
    • http://files.whichwolfwillwin.com/uploads/1/3/2/8/132815787/wurejabowakesara.pdf
    • https://cdn.shopify.com/s/files/1/0432/0002/0635/files/lazizefufifeluxaxiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3069/1496/files/zamumojavefozoniju.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/jirijososobevulujujikamek.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/6082318035.pdf
    • https://cdn.shopify.com/s/files/1/0430/4997/5959/files/xizurobuwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8578/3447/files/jalenegowunumalatigoguva.pdf
    • https://cdn.shopify.com/s/files/1/0428/7083/3319/files/51336392894.pdf
    • https://cdn.shopify.com/s/files/1/0437/6110/7105/files/beating_the_street_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0438/4853/2128/files/skyrim_belt_fastened_quivers.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/fedex_uniform_straight_bill_of_lading_original.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0700/files/fasavamelokozefofipimifej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67257536452.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/
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/6082

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088bf.bin
88e432404451caf583d12cf18d5292c32bf9a0f715cf41b9b6c35092974b2f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88BF 5228 bytes
font_01_sfnt_off00009a6e.bin
ec8d08be8a38d24d84a73ba9025c73f36235f65505d30b4aaf04701360195476		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6E 10060 bytes

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