Malicious PDF — malware analysis report

Static analysis result for SHA-256 3597c8a0fd26f476…

MALICIOUS

PDF

35.1 KB Created: 2020-08-08 12:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 647a31094c8da6a559027f1071344647 SHA-1: d27f05d72c8f61cd05ada7275069c26a4b96f37b SHA-256: 3597c8a0fd26f47680948e473862120e1d3cc80257ff48ad609992d4b55e52a2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=groover+robotics+industrial+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same lure text and URLs as found in the heuristics. The primary attack pattern involves tricking the user into clicking a malicious link within the document, likely leading to further compromise.

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/pify?keyword=groover+robotics+industrial+pdf
    • http://files.buildingleadersforsuccess.com/uploads/1/3/0/7/130776208/jizerefowanuraladiw.pdf
    • http://pasevalo.canadianbarleytea.com/uploads/1/3/1/0/131069934/8372194.pdf
    • http://files.bbbf-sizzlereads-bestbookboyfriends.com/uploads/1/3/0/7/130776875/7ffd6.pdf
    • http://files.krshairandwaxstudio.com/uploads/1/3/0/7/130775784/simajefebakegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/58733619784.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6240/files/33365606103.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/45910752804.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5888/files/d_d_3._5_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/zokaxutepuziwuvo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/enfermedad_cerebrovascular_isquemico.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/divumajuzibuma.pdf
    • https://cdn.shopify.com/s/files/1/0429/2457/2835/files/al_quran_rasm_uthmani_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2377/files/54511542093.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9521/files/pathfinder_collection_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0437/7467/3057/files/77539122061.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77636621448.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_off00004bc1.bin
587fbad1d02aea793457edc969c458000c5a538aef99adb003abe9be0bfbfb55
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BC1 5380 bytes
font_01_sfnt_off00005e23.bin
a5b0946e7029e6b565b467a3bbfb756270b8389f59ab7c2d905476e0b93148c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E23 9764 bytes