Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7fc1d32788743f…

MALICIOUS

PDF

40.0 KB Created: 2020-08-15 03:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b951be010240301ddfed2f959c58bb43 SHA-1: 824ba9da0f33c00715096098c25ce97ba12ee2db SHA-256: 7a7fc1d32788743fa878edcfb021dc19aead68c483f0b1e21376b34d82819e08
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=christmas+invitation+template+pages', is identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Christmas invitation template pages'. The presence of numerous external PDF links, including the malicious one, indicates an attempt to direct the user to potentially harmful content, likely for phishing or malware distribution.

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=christmas+invitation+template+pages
    • http://files.stoneranchpta.org/uploads/1/3/1/3/131398085/kezulede_nabilagebo_xegapukib_natilaru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/juruvowurevudadep.pdf
    • https://cdn.shopify.com/s/files/1/0428/6572/1503/files/bujerelewofibedoxa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/jaxojigoxoxi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/renatinifujub.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/86285711273.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/bamuwewir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37638787324.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/raluto.pdf
    • https://cdn.shopify.com/s/files/1/0428/1224/4134/files/kuzotovomatajobasivogaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/kefapo.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_off00005e48.bin
72e7f41aafb7f16cc696d27f2c597691dc557766764de4dd97078cdc64acad89
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E48 5200 bytes
font_01_sfnt_off00006fd6.bin
d88a8a58bc29801cd5e0ded18d21ad07ffb50b1c671df2eeabea1cf62b348e97
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD6 10408 bytes