Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7f483e5ec7992a…

MALICIOUS

PDF

48.5 KB Created: 2020-08-30 07:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de852e736de680c96c2c29be8a4a8c1a SHA-1: c053a038af6de42ec6f1b56e39de162388db636b SHA-256: 3e7f483e5ec7992ac215a7c4e92e825a451d4c46fb92ab9f313bed976c5b2497
140 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=astm+a370-17+pdf+free+download'. The document body, though heavily obfuscated, appears to contain this URL and references a 'free download' for 'Astm a370-17 pdf', suggesting a lure. The presence of numerous other links to PDF files, many hosted on CDNs, indicates a link farm strategy, likely to improve search engine ranking for malicious content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=astm+a370-17+pdf+free+download
    • https://static.usrfiles.com/ugd/b8c837_5ba0899f1c3b4c5b88aad73add6155e6.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_32515efe582a437cab873deebd234e34.pdf
    • https://static.usrfiles.com/ugd/b8c837_15b2830db5804f10a4d84a83cd59a3a4.pdf
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/regofizimu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9560/files/auxiliares_de_comercio_costa_rica.pdf
    • https://cdn.shopify.com/s/files/1/0429/2080/4518/files/81090928880.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/rotupuwoxivilemixenome.pdf
    • https://cdn.shopify.com/s/files/1/0448/3697/8850/files/susesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5590/files/92890540859.pdf
    • https://cdn.shopify.com/s/files/1/0434/6662/1094/files/14381807613.pdf
    • https://cdn.shopify.com/s/files/1/0440/8868/8790/files/62995769010.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/ff14_miner_leves.pdf
    • https://cdn.shopify.com/s/files/1/0436/0686/8131/files/baronekutokovawinevetila.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/vaputubenedasu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1256/files/mariah_boat_owners_manual.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_off00007435.bin
b4db834c43daeaf204071addbffc6c413f7a3f410b3dc0e7b28fd7ae14273e1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 5740 bytes
font_01_sfnt_off000087c4.bin
e67c3433850cf5bd123b0a5b4d536b0c772341878ff682351104914a53defbc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x87C4 14276 bytes