Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85fa99c3d7e3ca7…

MALICIOUS

PDF

33.4 KB Created: 2020-08-29 03:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c998f4e118c4da12c39880a5fa603cb SHA-1: 345473aa37d9cf939826f77fa07df7397f1fc8ef SHA-256: a85fa99c3d7e3ca7553bb767e3f8db36bd70a8fad9b9eabe99208f127849486e
128 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 ttraff.com. This indicates the document's primary purpose is to lure users into clicking a link that leads to malicious infrastructure. Additional heuristics indicate a link farm and a visual download button, reinforcing the social engineering aspect of the attack. No scripts were extracted, but the embedded URL is sufficient to establish the malicious intent.

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.com/wix?keyword=free+bangla+choti+pdf+file
    • https://cdn.shopify.com/s/files/1/0428/8407/1583/files/appvalley_2._0_apk.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6955/files/volkswagen_jetta_2017_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/kivaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/38055909817.pdf
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/bodies_by_rachel_train_like_me.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5039/files/gw2_durmand_priory_poi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/easy_algebra_word_problems.pdf
    • https://static.usrfiles.com/ugd/b8c837_aadeb2e488894cd59f939b3042c55c3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_257d23e1e02542b4b4d88e6a581935f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_30bda6cbade347fe9b4b4577d96426f8.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_off0000468a.bin
0a819add20c0b67d392e01d1b4281abae19b4a21c07eb459d1b0f46fd0a77b62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x468A 5336 bytes
font_01_sfnt_off0000589c.bin
ed8a95cd81fe75de945a9127bc7dc81c4725d9ebd3ee0b08dd70d7937ce14a0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x589C 9496 bytes

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