Malicious PDF — malware analysis report

Static analysis result for SHA-256 7997764e0fc22a2b…

MALICIOUS

PDF

45.5 KB Created: 2020-08-22 17:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15f57b261bb1bc9188e99943527d958a SHA-1: 8aaa0739bd57d61f9cd4741f8bb2366e10df3ce7 SHA-256: 7997764e0fc22a2bb4e8deae156fcdb38cbd9c1755b7173cede881262b982851
128 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and numerous embedded URLs suggest a lure to download further content, potentially a malicious payload. The PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, many hosted on cdn.shopify.com, which are likely part of a link farm to improve search engine ranking for the malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=date+sheet+gndu+ba+1st+sem
    • http://files.greatcowbasic.com/uploads/1/3/1/8/131856907/bugobadewuderasebado.pdf
    • http://mekovijed.confidentlyuare.org/uploads/1/3/1/8/131871462/7059024.pdf
    • http://files.doubleimagetheaterlab.com/uploads/1/3/2/6/132681617/67b562ad87.pdf
    • http://files.cflhfes.com/uploads/1/3/1/4/131407469/kibaxutup-xonaxawa-xurez.pdf
    • http://files.monroecounty2020.com/uploads/1/3/0/8/130873708/7560252.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/controls_and_variables_spongebob_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/zogidofugifawurobe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7576/files/18378426603.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/53340893807.pdf
    • https://cdn.shopify.com/s/files/1/0435/9893/8274/files/katuletemi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6095/2229/files/72709135349.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1087/files/reading_comprehension_past_simple_regular_verbs.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/colspan_autotable_jspdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1835/3821/files/gipugetumanaja.pdf
    • https://cdn.shopify.com/s/files/1/0446/1743/3251/files/meek_mills_traumatized_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/31409890128.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_off000072cc.bin
8836dbdcd0a1409fc2bb48147863b150f050908025286b9153fe5556a35a3e6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x72CC 5304 bytes
font_01_sfnt_off000084ae.bin
d3fc7801dfaced349b1e24d5104649b1c008ff1a84506a3a55b03e14f53cfa89
pdf-font-stream PDF embedded font (sfnt) at offset 0x84AE 11012 bytes