Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d20b73fe30c532…

MALICIOUS

PDF

44.4 KB Created: 2020-08-30 08:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a782fe60a7cd1717d9ac7331db863b87 SHA-1: 28824629155ab808757d066449bbbc1a40d7feff SHA-256: c2d20b73fe30c532d005ab9c13d639bdadea41fc9108f38a2c67201d8a704948
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to static.usrfiles.com, which is indicative of a link farm or SEO spam campaign. One of the primary links, https://ttraff.com/wix?keyword=soft+piano+instrumental+hindi+music+free+download+mp3, is flagged as a malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=soft+piano+instrumental+hindi+music+free+download+mp3
    • https://static.usrfiles.com/ugd/5ecadc_d2b6113f6a924d0a9a798616f70a1b88.pdf
    • https://static.usrfiles.com/ugd/5b604d_48d865f36ffa4083aa669a0b84690c1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5e70e157be746149adf42f7af666429.pdf
    • https://static.usrfiles.com/ugd/9b33c5_65ef81f6a0ba42bbb77bb3f22d7281e2.pdf
    • https://static.usrfiles.com/ugd/0dd040_fed9618b74f149bd88870f91e71ace44.pdf
    • https://static.usrfiles.com/ugd/b8c837_e194a8b53e5d4a61bf784cea8ec7719b.pdf
    • https://static.usrfiles.com/ugd/cb4a18_1b9cbb131f374e6598a3e504418441b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_e13da048f9344248bcfe33ac53382547.pdf
    • https://static.usrfiles.com/ugd/1be480_0feaa4c358484d238a8d0433d40752e9.pdf
    • https://static.usrfiles.com/ugd/b11f6d_9f69af6b9d254ae28708d35ff994946c.pdf
    • https://cdn.shopify.com/s/files/1/0432/2535/0301/files/54654595929.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/dinakekosubedewotonigi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4084/7510/files/jamison_mattress_reviews_consumer_reports.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/tratados_internacionales.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/alcatel_one_touch_1016g_manual.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_off00005f1b.bin
3f18bd534fb600650fd12fd935a686f650e1d6abdaaf69885629c82b0de32ba4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1B 5636 bytes
font_01_sfnt_off00007220.bin
8607e395585d26532a4bd978250c252c79afe73bc3dfed878d5f769a6411d022
pdf-font-stream PDF embedded font (sfnt) at offset 0x7220 10656 bytes
font_02_sfnt_off00009653.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9653 4324 bytes