Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2231a9ef5aad1c1…

MALICIOUS

PDF

46.5 KB Created: 2020-07-16 17:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47336557b999609a33304842c91a3db2 SHA-1: 9e9227d687f32c1ac6c29e47335cef7d3d5edcb3 SHA-256: b2231a9ef5aad1c125f35b580b4a06c0cd8c1fed366bbe25d9d05370370b9afa
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, identified as a link farm, designed to redirect users to malicious sites. One of the primary links points to a known malicious redirector infrastructure. The document's content is presented as a 'transfer letter to employee pdf', a common lure for phishing attacks. No scripts were extracted, but the extensive use of malicious links indicates a strong intent to lead the user to further compromised content.

Heuristics 3

  • 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.
  • 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/wb?keyword=transfer%20letter%20to%20employee%20pdf
    • http://files.willsshowem.com/uploads/1/3/2/7/132712407/tigejexafod-fulaxolito.pdf
    • http://files.aboundingfaithnj.org/uploads/1/3/0/9/130969593/xugafije.pdf
    • http://files.boob-ology.co.uk/uploads/1/3/2/3/132303374/vinewagejar-kubojaba-rajezutiwugudow-vifiwejapi.pdf
    • http://files.missycampmusic.com/uploads/1/3/2/6/132680915/2adb877e6f7f295.pdf
    • http://files.issportstherapy.com/uploads/1/3/1/4/131406717/3894613.pdf
    • http://files.julianbullmagic.com/uploads/1/3/2/8/132816195/8366476.pdf
    • http://files.professionalcatcare.com/uploads/1/3/1/3/131383954/7581846.pdf
    • http://files.iwfmasters.org/uploads/1/3/1/4/131454501/belivir_rafomepiw_vasasusanovuwa_jazarofuj.pdf
    • http://files.boob-ology.co.uk/uploads/1/3/2/3/132303374/vi
    • https://wipafuvuz.files.wordpress.com/2020/06/tegeluloguzapojofofojer.pdf
    • https://tagugela.files.wordpress.com/2020/07/posol.pdf
    • https://neretive.files.wordpress.com/2020/07/27290686459.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8711/files/zadivuvumedaxujazavuzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/merasefid.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/54819550278.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/jiwujowolopup.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8375/files/71841457057.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70278744099.pdf
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/jamasefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48787523288.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/46798885609.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/59951186075.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_off0000778f.bin
620d1ad145bad642b39af4a75c6a586370e9b28f199f577ed751b7d0b9b3a8c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x778F 4980 bytes
font_01_sfnt_off00008864.bin
73045e1a09a8193fb6210c54ebf4be414341bf0b936f13b139be22c7a36c3839
pdf-font-stream PDF embedded font (sfnt) at offset 0x8864 10640 bytes