Malicious PDF — malware analysis report

Static analysis result for SHA-256 949a9d99088112ae…

MALICIOUS

PDF

43.6 KB Created: 2020-08-26 15:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7af65a0dfe6071c5058042fc439cb6c SHA-1: 1120b841e3c7dfbe70a578387d3a15b11d462f2b SHA-256: 949a9d99088112ae9566d31c1377511c4396e6ff105e197278848a71c4845e8e
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a link farm designed to lure users. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=livro+de+melquisedeque+pdf', which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the intent is to trick users into clicking it. 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.com/pify?keyword=livro+de+melquisedeque+pdf
    • http://files.galleypower.com/uploads/1/3/2/8/132815190/15a5ade77842.pdf
    • http://files.hannahlynchphoto.com/uploads/1/3/1/4/131437515/zedikumom.pdf
    • http://sunesoz.mcdesignservices.com/uploads/1/3/0/7/130739783/8290916.pdf
    • http://files.nativetales.com/uploads/1/3/0/7/130775942/b90bae542e.pdf
    • http://files.earlychildhoodpartners.com/uploads/1/3/1/0/131070520/1284791.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/felepajol.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/37450909632.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/mapa_turistico_barcelona_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/60516708717.pdf
    • https://cdn.shopify.com/s/files/1/0435/9349/8787/files/rofonasuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/9599/7096/files/atrocity_act_in_marathi_language_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/5649/6794/files/darexinivizapudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5387/5357/files/33885509596.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6807/files/xakidojanozof.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1236/files/spider_man_2018_soundtrack.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/files/1/0430/5649/6794/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068e3.bin
659c90ce83932c0527bf3eea07f0151a278b7f1274199666cb63d5c535b11a1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x68E3 5104 bytes
font_01_sfnt_off00007a35.bin
c1c20d61670d41fa5c963d9cec00f3508b103d29ddc2b76053fff6185feca691
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A35 12516 bytes