Malicious PDF — malware analysis report

Static analysis result for SHA-256 4080fd4940dbe8c1…

MALICIOUS

PDF

54.4 KB Created: 2020-08-08 04:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf1837d377a7f5e02e0e7f196d51d6c2 SHA-1: 0957682e77d32a193ecad8cb529ad2715b830b64 SHA-256: 4080fd4940dbe8c1c83309d4f34d37d6df8c39647d1569658849fff73c080101
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, suggesting an SEO poisoning attempt to rank for specific search terms like 'beretta tomcat manual pdf'. One of the primary links, 'https://ttraff.ru/pify?keyword=beretta+tomcat+manual+pdf', is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=beretta+tomcat+manual+pdf
    • http://sonasimul.arm-group-llc.com/uploads/1/3/0/7/130739777/kajav_razagefoko_pagobarix_lafawagivijafu.pdf
    • http://files.sticklevarietystore.com/uploads/1/3/0/8/130813526/448bf95f.pdf
    • http://files.cea-alaska.org/uploads/1/3/2/6/132695491/8890882.pdf
    • https://cdn.shopify.com/s/files/1/0443/8907/3062/files/geometric_nonlinear_functional_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4469/files/69821724876.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/federal_financial_aid_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/67797638528.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/goxabaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/5387/4329/files/vabigiwobigite.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fupibi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/81252991249.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/batch_convert_word_to_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/a_flirtationship_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7632/1434/files/4858712053.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/xofikekurotujani.pdf
    • https://cdn.shopify.com/s/files/1/0437/6169/6925/files/como_hacer_una_bibliografia_de_un_libro.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/
    • https://cdn.shopify.com/s/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000762f.bin
7d8dec827499dba3c47f6f7c7c973a2fc9d34b131747b22a8de56086489c74da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762F 5008 bytes
font_01_sfnt_off00008713.bin
f7ecdb67c62cf1e7fa6438d682c65cd1685101f2d46e0b30b08dd8c1b4e43178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8713 9928 bytes
font_02_sfnt_off0000a949.bin
ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA949 16060 bytes
font_03_sfnt_off0000bddd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDD 4324 bytes

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