Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dce890ef807c6a1…

MALICIOUS

PDF

43.9 KB Created: 2020-08-31 08:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0242d0a6af0373f531717a3bf587c4e8 SHA-1: 2a5fcad981379980d33f25982346783f6dcb039b SHA-256: 7dce890ef807c6a17eb6ce71d37b17d0c9ff424db92fd0928153e3a135dbfab0
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious domain, disguised as a download for ukulele tabs. This is further supported by heuristics indicating a malicious redirector and a link farm designed for SEO manipulation. The document body contains garbled text but includes the malicious URL and a reference to 'ukulele tabs download pdf', reinforcing the lure.

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/wix?keyword=ukulele+tabs+download+pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7932/files/kumano_kodo_hiking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/9068957622.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/longman_dictionary_of_english_idioms.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/waganojimizesewirivij.pdf
    • https://cdn.shopify.com/s/files/1/0431/6636/7895/files/2005_ford_escape_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulanevu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6909/6615/files/guvuvanodera.pdf
    • https://cdn.shopify.com/s/files/1/0435/5502/9141/files/51261877183.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/worldunlock_codes_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/vuludumurad.pdf
    • https://cdn.shopify.com/s/files/1/0429/2149/2643/files/belfast_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0433/1238/2116/files/71587129462.pdf
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/wawipekesidurisuvi.pdf
    • https://cdn.shopify.com/s/files/1/0448/4136/9761/files/basic_guitar_chord_chart.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060dd.bin
9b18059ce111affb56f873a4379018d4fea6721e6bac71017be60a74e8b4448f
pdf-font-stream PDF embedded font (sfnt) at offset 0x60DD 5060 bytes
font_01_sfnt_off00007236.bin
b8aa448fc3969ebed526e989bf41dc9d9b005eeea0aaabf00a4a56d7a54b4f12
pdf-font-stream PDF embedded font (sfnt) at offset 0x7236 10120 bytes
font_02_sfnt_off0000949b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x949B 4324 bytes