Malicious PDF — malware analysis report

Static analysis result for SHA-256 72981118cd1b1196…

MALICIOUS

PDF

44.6 KB Created: 2020-08-09 10:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7360fa826a980b2cd916de53de484b49 SHA-1: 44d626e8e85389baf198fd07c0091fdd2480289e SHA-256: 72981118cd1b11969a7798e931c0ba8ea31aecabfed55e775c5538b5f9023081
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a link farm designed to distribute malicious content. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=act+bubble+sheet+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious sites. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a phishing or redirection attack.

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.cc/pify?keyword=act+bubble+sheet+pdf
    • http://files.wrestlingdoneright.com/uploads/1/3/2/8/132814168/mazowixipiz-rafile.pdf
    • http://files.firstathens.org/uploads/1/3/2/7/132710687/9347935.pdf
    • http://files.michelleclarkvm.co.uk/uploads/1/3/0/9/130969313/80d6db4dae0.pdf
    • http://files.iljadecoster.be/uploads/1/3/1/4/131406739/sunali.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/hp_laserjet_3050_driver.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/42329725782.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/dadalikotumiwitajawolimog.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/77589687923.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/7825667371.pdf
    • https://cdn.shopify.com/s/files/1/0432/9016/5403/files/luvoto.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/xinuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/zuzefefixo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/no_world_break.pdf
    • https://cdn.shopify.com/s/files/1/0434/1766/5701/files/jurnal_acetobacter_xylinum.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/18146207201.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007037.bin
138053731eb8af5da06bafa6501396fd5db3d99dfbcf9d59df1d9b70c1e9463a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 5068 bytes
font_01_sfnt_off00008176.bin
ec3a481800f5e781c406be38dc6f5b110304b3af625ef97fc890eb5a18e03c28
pdf-font-stream PDF embedded font (sfnt) at offset 0x8176 10576 bytes