Malicious PDF — malware analysis report

Static analysis result for SHA-256 55653f81aa897c1f…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 06:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 291151903c0909cb436f9e07a77ea255 SHA-1: cd28d72fa83dcf8487e5ae6f228907fe96da26a5 SHA-256: 55653f81aa897c1f97d07314e815e73b1fdbbec022c0ab8072cc3cf90f44beda
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=avid+media+composer+8.+9+free'. This indicates the document is designed to trick users into clicking a link, likely under the guise of a software download as suggested by the document body and the 'SE_DOWNLOAD_BUTTON' heuristic. The PDF also contains a link farm, further supporting a malicious intent to drive traffic to external sites.

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.cc/pify?keyword=avid+media+composer+8.+9+free
    • http://files.visionquilt.org/uploads/1/3/1/4/131482819/7dca44f6f.pdf
    • https://cdn.shopify.com/s/files/1/0435/5912/5160/files/baldomero_lillo_sub_sole.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/69307092003.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/visokukeno.pdf
    • https://cdn.shopify.com/s/files/1/0430/6845/7122/files/23496518011.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1449/files/27999144148.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/200_times_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/41820046786.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/85397512660.pdf
    • https://cdn.shopify.com/s/files/1/0437/5016/2581/files/xaruxorogilud.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/rewulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/c._s._lewis_the_lion_the_witch_and_the_wardrobe.pdf
    • https://cdn.shopify.com/s/files/1/0435/0889/1807/files/igitabo_cy_amategeko_ahana_mu_rwanda.pdf
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/61500326318.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_off000061b5.bin
d148eddfa2fa1f7bbdea603942d5d4d0399654003de01ed9c708177242f041d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 5700 bytes
font_01_sfnt_off00007502.bin
0c4305f4eca045ba26471a5b27c01056c2978b98f7f5185fda9100cd7fce8936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7502 11424 bytes

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