Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34501b365e1f482…

MALICIOUS

PDF

37.4 KB Created: 2020-08-25 05:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b9638d1714ebce476f222615eb303b5 SHA-1: b8541e3dcb5eb7965c8c8d3aa4862ecb869c84eb SHA-256: f34501b365e1f482147208281d9c58ad973cf9d32b9a08abf2d51fb9f54cd735
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is further disguised by the document body text mentioning 'Digraph phonics worksheets'. This suggests the document's primary purpose is to trick users into clicking the malicious link, likely leading to a phishing page or malware download.

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/pify?keyword=digraph+phonics+worksheets
    • http://kusuzeda.solakiancpa.com/uploads/1/3/0/7/130738531/bozezigekiril.pdf
    • http://files.windhamchambersingers.com/uploads/1/3/0/7/130775027/8f035b6.pdf
    • https://cdn.shopify.com/s/files/1/0429/5491/6003/files/causas_del_imperialismo_del_siglo_xix.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/41292915775.pdf
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/17817533308.pdf
    • https://cdn.shopify.com/s/files/1/0430/8136/7712/files/bloodstone_of_the_precursor.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/77742753428.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5809/files/rhythm_and_meter_in_poetry.pdf
    • https://cdn.shopify.com/s/files/1/0448/7803/7159/files/49349278535.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/kadodufajixatoponibo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/roxudoduwifimapilolozo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0311/6709/files/59267486368.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_off000046e4.bin
0a470ea9703eef2821a92364ca3948d7cc43b071f1597435872e3557557c734d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46E4 5104 bytes
font_01_sfnt_off0000584e.bin
b876c6f2d5280cca0c8951e6c0fd7121cd715b94500da41c7c34dc28f78e67a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x584E 10120 bytes
font_02_sfnt_off00007afc.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFC 4324 bytes

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