Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe255949ea0d525…

MALICIOUS

PDF

35.0 KB Created: 2020-08-31 07:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f3d07c827e93804f8846602587b4573 SHA-1: f28c930749a1569fa97ffac1c4e2bb86c7477c50 SHA-256: 8fe255949ea0d525ee31d07a7b78c18628e64fb6777365de513aeef8bfb38b30
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=avia+2+pedometer+manual'. The document body, though heavily obfuscated, contains text fragments that appear to be related to a 'pedometer manual' and the malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute the malicious 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.ru/wix?keyword=avia+2+pedometer+manual
    • https://cdn.shopify.com/s/files/1/0440/7564/7128/files/96248928124.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/velugidipaguketirujux.pdf
    • https://cdn.shopify.com/s/files/1/0430/8225/2442/files/25488525308.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/43555526020.pdf
    • https://static.usrfiles.com/ugd/fbccce_17232663b1344205a57412561f36e208.pdf
    • https://cdn.shopify.com/s/files/1/0441/3286/0056/files/lobogajerokiloxara.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/temefipomuvadetesabutunan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/lirefonojagakanigomo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0002/1667/files/el_secreto_de_belicena_villca.pdf
    • https://cdn.shopify.com/s/files/1/0438/9833/9496/files/tuwerulutasit.pdf
    • https://static.usrfiles.com/ugd/b8c837_c888e8bd03584673869bf0b0a5d6cd2f.pdf
    • https://static.usrfiles.com/ugd/d1c05f_ac0b64bd2376470280b902410d03a1c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b8b994bfbaf4669bd8201a54318016d.pdf
    • https://static.usrfiles.com/ugd/4f270c_961bf9396a1d437b90123cb728ef353a.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_043c592770af487887f2992e610fe4ea.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_off00004b84.bin
090c52124f264d64bd2abe3f8449b32a832be814264fb60ca51cfceee7eac4f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B84 5108 bytes
font_01_sfnt_off00005cd2.bin
539ccbfebba245096bf2b1c6eec7f972babcfede8e75c1ebcc1042b972f2f75d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD2 10032 bytes

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