Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2069ffed50d15b6…

MALICIOUS

PDF

41.5 KB Created: 2020-09-03 09:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a2142228ab4a08667ade2be0365d1ca SHA-1: d59f176eb2785d994b2e45e3444de0d5126c7779 SHA-256: a2069ffed50d15b62318b226abd48f24f303b68c00a4a4bb1ec53d2bd74e4fed
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=semicolon+and+colon+worksheet', which is flagged as malicious. The presence of numerous other links hosted on cdn.shopify.com suggests a link farm intended to obscure the malicious destination.

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.link/wix?keyword=semicolon+and+colon+worksheet
    • https://cdn.shopify.com/s/files/1/0430/5613/6341/files/abnormal_psychology_noun.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/12111529021.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/13567968007.pdf
    • https://cdn.shopify.com/s/files/1/0435/2809/3850/files/walmart_w2_forms.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/vijijal.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_f26588e5a76448f7aa390efcca23acb2.pdf
    • https://static.usrfiles.com/ugd/2b25e8_01d9f3db9d4a415db706251eb5640093.pdf
    • https://static.usrfiles.com/ugd/d017d5_0d71731a24b9424fa64969344de4c58d.pdf
    • https://cdn.shopify.com/s/files/1/0447/0688/9882/files/android_emulator_network_latency.pdf
    • https://cdn.shopify.com/s/files/1/0462/2601/4362/files/36114960070.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/problem_oriented_medical_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/45109033040.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_off0000632f.bin
69ec20037949861477699b92ab355b023a32cf0b6ff7f9f9b0970ec171a3dabf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632F 5440 bytes
font_01_sfnt_off0000758f.bin
24576a1a93eabe762f9a8040f254d0f0a187d9ef0ba7b6bd655a8cb84b52c5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758F 10516 bytes

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