Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ac1639c95dac98…

MALICIOUS

PDF

43.1 KB Created: 2020-08-06 14:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea991ed45449f4810ea3de7a9a057d09 SHA-1: ecd93a2d015bad539fd2e8ade0b9c677829f369f SHA-256: e6ac1639c95dac986ec1d152bf113ad95dd1e838843f79f7e727ef0436b53f67
130 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text fragments that appear to be a lure for 'Cambridge english proficiency 2 pdf chomikuj', suggesting a phishing or scam attempt. The presence of a download button lure further supports this. The primary attack vector is likely a user clicking the malicious link within the document.

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=cambridge+english+proficiency+2+pdf+chomikuj
    • http://feruvez.katewestcott.com/uploads/1/3/1/0/131070161/soxid-rajedufonokokav-kuzukoxumijidap.pdf
    • http://files.myped15.com/uploads/1/3/1/4/131437249/xaziwoner_fezomabazadis.pdf
    • http://files.accpubink.com/uploads/1/3/2/3/132303353/540911754142ed0.pdf
    • http://files.maldenmedia.com/uploads/1/3/0/7/130775228/6cfafd8036277d.pdf
    • http://files.weenip.org.uk/uploads/1/3/1/0/131069887/0ff32.pdf
    • https://cdn.shopify.com/s/files/1/0439/5502/8126/files/container_gardening.pdf
    • https://cdn.shopify.com/s/files/1/0428/5811/9334/files/tejumulijoragexo.pdf
    • https://cdn.shopify.com/s/files/1/0429/4849/3475/files/toyota_rav4_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/20830364779.pdf
    • https://cdn.shopify.com/s/files/1/0432/3776/9383/files/90041433281.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/famezi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9162/3077/files/84989532555.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/fenuzetij.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7367/files/baldor_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/binomio_de_newton_exercicios.pdf
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/7534029383.pdf
    • https://cdn.shopify.com/s/files/1/0434/4279/8757/files/32605693127.pdf
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/69062702507.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/statics_and_mechanics_of_materials_bedford.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_off000068f4.bin
0986d2f0d7aa4244f78ea269b9577047e6561c0b3ee91c690c27996e2d32bd86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F4 5988 bytes
font_01_sfnt_off00007d30.bin
e5e57cf681b13857ff66589b95604359074c99c8fe35adea1019fa225dd99a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D30 9948 bytes

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